NBIBDs from homogeneous groups

These designs are derived from sub-groups of the multiplicative subgroups of doubly homogeneous groups.

NBIBDs with k1 = 21 and k2 = 7
v b r First Initial block Multiplied by:-
43 43 21 (1,41,4, 35,16,11,21 | 9,25,36,14,15,13,17 | 38,10,23,40,6,31,24) 1 mod 43
127 381 63 (1,4,16,64,2,8,32 | 94,122,107,47,61,117,87 | 73,38,25,100,19,76,50) 1, 9, 81,...,81 mod 127
211 1055 105 (1,171,123,144,148,199,58 | 180,185,196,178,54,161,101 | 117,173,43,179,14,73,34) 1, 4, 16,...,45 mod 211
379 3411 189 (1,125,86,138,195,119,94 | 255,39,327,322,76,25,93 | 216,91,5,246,51,311,217) 1, 4, 16,...,348 mod 379
463 5093 231 (1,412,286,230,308,34,118 | 251,163,21,318,450,200,449 | 33,169,178,182,441,196,190) 1, 9, 81,...,388 mod 463
547 7111 273 (1,81,544,304,9,182,520 | 169,14,40,505,427,126,360 | 117,178,196,13,506,508,123) 1, 4, 16,...,179 mod 547
631 9465 315 (1,269,427,21,601,133,441 | 458,157,587,153,142,338,58 | 272,603,40,33,43,209,62) 1, 9, 81,...,121 mod 631
883 18543 441 (1,707,71,749,626,199,296 | 729,614,545,327,726,259,332 | 758,808,838,856,337,732,86) 1, 4, 16,...,403 mod 883
967 22241 483 (1,648,226,431,792,706,97 | 577,634,824,168,560,255,850 | 281,292,651,236,142,151,181) 1, 25, 625,...,758 mod 967
1051 26275 525 (1,845,396,402,217,491,801 | 464,57,870,501,843,808,661 | 892,173,96,193,180,756,863) 1, 49, 299,...,417 mod 1051
1303 40393 651 (1,426,359,483,1187,98,52 | 1016,220,1207,800,717,540,712 | 280,707,189,1031,95,77,227) 1, 36, 1296,...,173 mod 1303
1471 51485 735 (1,1217,1263,1347,605,785,666 | 765,1333,1219,755,931,357,524 | 1238,342,1392,943,251,970,748) 1, 36, 1296,...,389 mod 1471
1723 70643 861 (1,555,1331,1261,317,189,1515 | 677,121,1681,812,957,451,470 | 11,936,857,87,41,356,1158) 1, 9, 81,...,841 mod 1723
2143 109293 1071 (1,592,1155,143,1079,154,1162 | 1818,470,1793,671,777,1382,1661 | 618,1546,171,511,349,880,211) 1, 9, 81,...,202 mod 2143
2311 127105 1155 (1,850,1468,2171,1172,159,1112 | 574,279,1428,525,227,1137,452 | 1314,687,1578,920,882,936,616) 1, 9, 81,...,2118 mod 2311
2647 166761 1323 (1,2331,1917,391,853,446,2002 | 453,2437,185,2421,2594,866,1632 | 1390,162,1748,855,2461,542,783) 1, 9, 81,...,1815 mod 2647
2731 177515 1365 (1,1238,553,1864,2668,1205,664 | 2103,871,2284,1007,1330,2478,851 | 1120,1943,2154,1196,446,486,848) 1, 9, 81,...,1144 mod 2731
3067 223891 1533 (1,518,1495,1526,2249,2589,823 | 2455,1952,2093,1523,695,1171,2379 | 370,1506,1090,292,973,1026,877) 1, 4, 16,...,2914 mod 3067
3319 262201 1659 (1,21,441,2623,1979,1731,3161 | 1313,1021,1527,2196,2969,2607,1643 | 1408,3016,275,2456,1791,1102,3228) 1, 36, 1296,...,1235 mod 3319
3571 303535 1785 (1,2767,65,1305,654,2692,3229 | 2141,3429,3467,1483,382,3549,3404 | 2288,3084,2309,484,103,2892,3124) 1, 4, 16,...,1428 mod 3571
3739 332771 1869 (1,929,3071,102,1283,2905,2926 | 85,446,3044,1192,624,151,1936 | 3486,520,749,367,694,1618,44) 1, 49, 2401,...,2062 mod 3739
3823 347893 1911 (1,1123,3362,2225,2256,2662,3663 | 3328,2273,2638,3472,3419,1245,2740 | 353,2650,1656,1710,1184,3051,865) 1, 9, 81,...,3768 mod 3823
3907 363351 1953 (1,739,3048,2040,3365,1883,645 | 2488,2342,3844,327,3326,411,2890 | 1456,1559,3443,920,62,2841,1440) 1, 4, 16,...,622 mod 3907
4159 411741 2079 (1,970,966,1245,1540,719,2877 | 1233,2377,1604,414,2316,660,3873 | 2254,2905,2207,3064,2554,2775,877) 1, 9, 81,...,137 mod 4159
4243 428543 2121 (1,1860,1555,2817,3758,1659,1079 | 2194,3317,298,2690,903,3595,3975 | 2074,753,390,4090,3944,3936,1785) 1, 4, 16,...,2670 mod 4243