A243326 Number of simple connected graphs with n nodes that are triangle-free and not integral.

0, 0, 1, 2, 5, 16, 58, 264, 1380, 9818

Offset

1,4

Links

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

Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs

T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644 [math.CO], 2014.

Crossrefs

Cf. A241842 (non-integral graphs), A024607 (triangle-free graphs).

Sequence in context: A328296 A300042 A019448 * A185143 A280760 A350717

Adjacent sequences: A243323 A243324 A243325 * A243327 A243328 A243329

Keyword

nonn,more

Author

Travis Hoppe and Anna Petrone, Jun 03 2014

Status

approved