A243339 Number of simple connected graphs with n nodes that are distance regular and K_4 free.

1, 1, 1, 1, 1, 3, 1, 3, 3, 4

Offset

1,6

Comments

K_4 is the complete graph on four vertices.

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, 2014

Crossrefs

Cf. A241814 (distance regular graphs), A079574 (K_4 free graphs).

Sequence in context: A029154 A211974 A136297 * A244965 A049996 A344793

Adjacent sequences: A243336 A243337 A243338 * A243340 A243341 A243342

Keyword

nonn,more

Author

Travis Hoppe and Anna Petrone, Jun 03 2014

Status

approved