Overview of 1-Rotational OBIBDs

These designs have been obtained by computer search. All designs have 1-rotational automorphism groups of order (v-1). They are presented as difference families, one initial block per line. The invariant treatment is represented as 1000.

For each design is given a heading (" Design ... ") with the number in the list, the group size, and the invariants of the graph as calculated by the program.

Designs for v = 8, 12, 16, 18 and 20 are given with k from 3 to 10 (where applicable) - see the menu above. Some of the listings have been curtailed to save space.