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A243798 Number of connected graphs with n nodes that are chordal and have no subgraph isomorphic to the bull graph. 0
1, 1, 2, 5, 6, 12, 25, 55, 126, 304, 745, 1893, 4893, 12916, 34562, 93844 (list; graph; refs; listen; history; text; internal format)



Table of n, a(n) for n=1..16.

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

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 6c1dbe4


Cf. A048192 (chordal graphs), A244427 (no bull subgraphs).

Sequence in context: A064765 A257805 A082552 * A057683 A277012 A277022

Adjacent sequences:  A243795 A243796 A243797 * A243799 A243800 A243801




Travis Hoppe and Anna Petrone, Jun 27 2014


Definition corrected (connected only) by Falk Hüffner, Jul 01 2018

a(11)-a(16) added using tinygraph by Falk Hüffner, Jul 01 2018



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Last modified December 16 01:43 EST 2019. Contains 330013 sequences. (Running on oeis4.)