A243334 Number of simple connected graphs with n nodes that are distance regular and triangle-free.

1, 1, 0, 1, 1, 2, 1, 3, 1, 4, 1, 3, 1, 5, 1, 5, 1, 4

Offset: 1

Author

Travis Hoppe and Anna Petrone, Jun 03 2014

Keywords

• nonn
• more

Links

• Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs
• Travis Hoppe and Anna Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644 [math.CO], 2014.

Crossrefs

Cf. A241814 (distance regular graphs), A024607 (triangle-free graphs).

Extensions

a(11)-a(18) from Max Alekseyev, Dec 29 2024