A361409 - OEIS

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A361409

Number of bicolored cubic graphs on 2n unlabeled vertices with n vertices of each color.

1, 0, 1, 5, 66, 1071, 27606, 887305, 34583357, 1562797351, 80177945542, 4597212665432, 291214532031215, 20193430937073303, 1521240318892230748, 123711268485285686123, 10801367759750192440520, 1007762402877770768660697, 100058924666668698411972015, 10533938778032068908299390227, 1172080056205294525370971027435

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,4

COMMENTS

Adjacent vertices may have the same color.

LINKS

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

CROSSREFS

Central coefficients of A361361.

Cf. A005638, A361406, A361410, A361411.

Sequence in context: A219678 A297743 A279463 * A367837 A331721 A367847

Adjacent sequences: A361406 A361407 A361408 * A361410 A361411 A361412

KEYWORD

nonn

AUTHOR

Andrew Howroyd, Mar 11 2023

STATUS

approved