A243241 Number of connected simple graphs on n nodes that are not strongly regular.

0, 0, 1, 4, 19, 109, 852, 11114, 261077, 11716566

Offset

1,4

Links

Table of n, a(n) for n=1..10.

Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs

Eric Weisstein's World of Mathematics, Strongly Regular Graph

Formula

a(n) = A001349(n) - A088741(n).

Crossrefs

Sequence in context: A199318 A117397 A004212 * A060905 A304473 A174123

Adjacent sequences: A243238 A243239 A243240 * A243242 A243243 A243244

Keyword

nonn,more

Author

Travis Hoppe and Anna Petrone, Jun 01 2014

Status

approved