A243785 Number of unlabeled simple connected graphs with n nodes that are chordal but not integral.

0, 0, 1, 4, 12, 56, 267, 1605, 11909, 109525

Offset: 1

Author

Travis Hoppe and Anna Petrone, Jun 27 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.
• Eric Weisstein's World of Mathematics, Chordal Graph.
• Eric Weisstein's World of Mathematics, Integral Graph.

Crossrefs

Cf. A048192 (connected chordal graphs), A241842 (non-integral graphs).

Cf. A243786.

Formula

a(n) = A048192(n) - A243786(n).