A243786 Number of unlabeled simple connected graphs with n nodes that are chordal and integral.

1, 1, 1, 1, 3, 2, 5, 9, 2, 14

Offset

1,5

Links

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

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.

Formula

a(n) = A048192(n) - A243785(n).

Crossrefs

Cf. A048192 (connected chordal graphs), A064731 (integral graphs).

Cf. A243785.

Sequence in context: A029619 A049922 A160106 * A278743 A393487 A382245

Adjacent sequences: A243783 A243784 A243785 * A243787 A243788 A243789

Keyword

nonn,more

Author

Travis Hoppe and Anna Petrone, Jun 27 2014

Status

approved