A022563 Number of 2-connected claw-free graphs on n nodes.

0, 0, 1, 3, 8, 32, 126, 619, 3332, 20910, 157721, 1590330, 23074092, 487448150, 14466253437, 585505737038

Offset

1,4

Links

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

R. Faudree, E. Flandrin and Z. Ryjacek, Claw-free graphs - a survey, Discr. Math., 164 (1997), 87-147.

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version e8699da.

Crossrefs

Cf. A022562, A022564.

Sequence in context: A148914 A148915 A151541 * A103939 A094610 A064316

Adjacent sequences: A022560 A022561 A022562 * A022564 A022565 A022566

Keyword

nonn,more

Author

N. J. A. Sloane.

Extensions

a(12) corrected using tinygraph by Falk Hüffner, Jan 18 2016

a(13)-a(16) from Brendan McKay, Jun 13 2021

Status

approved