A361403 Number of bicolored connected cubic graphs on 2n unlabeled vertices.

1, 0, 5, 23, 247, 4660, 124480, 4286155, 177173770, 8460721770, 456369771864, 27394102475517, 1809905002448020, 130479709461582679, 10191059146232826353, 857183200472049855001, 77244717697104310952411, 7424434373914632379955822, 758150225111024064264853603, 81967014740890327829104517614, 9353488650500180241693235592248

Offset

0,3

Comments

Adjacent vertices may have the same color.

Links

Table of n, a(n) for n=0..20.

Formula

Inverse Euler transform of A361362.

Crossrefs

Row sums of A321304.

Cf. A361362 (not necessarily connected).

Sequence in context: A295080 A323993 A156555 * A116652 A361362 A197936

Adjacent sequences: A361400 A361401 A361402 * A361404 A361405 A361406

Keyword

nonn

Author

Andrew Howroyd, Mar 10 2023

Status

approved