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A000843 Number of quartic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors. 2
0, 0, 0, 1, 1, 4, 12, 66, 433, 3442, 30404, 294951, 3093770, 34846185, 419020738, 5355289843, 72466668921, 1034818990771, 15548633703424, 245182764121059, 4047990858838185, 69826392559499108, 1256005988628521464, 23517396850332614602, 457623646061902648705 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..25.

CROSSREFS

Column k=4 of A333159.

Cf. A000513, A000840.

Sequence in context: A275527 A222612 A339134 * A180386 A302434 A121771

Adjacent sequences:  A000840 A000841 A000842 * A000844 A000845 A000846

KEYWORD

nonn

AUTHOR

Brendan McKay and Eric Rogoyski

EXTENSIONS

a(11)-a(25) from Andrew Howroyd, Mar 10 2020

STATUS

approved

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Last modified July 31 02:33 EDT 2021. Contains 346367 sequences. (Running on oeis4.)