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A289136 Number of colorings of the n X n king graph up to permutation of the colors. 3
1, 1, 270, 30066912, 3662498214110836, 978788002444637886853083440, 1017523795194980592656592864724960780556190, 6723457445689415320074916040888682277646129463792942126176174 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Jean-François Alcover, Table of n, a(n) for n = 1..11

Eric Weisstein's World of Mathematics, King Graph

MATHEMATICA

A208021 = Import["https://oeis.org/A208021/b208021.txt", "Table"][[All, 2]];

a[n_] := A208021[[2 n^2 - 2 n + 1]];

Table[a[n], {n, 1, 11}] (* Jean-François Alcover, Sep 23 2019 *)

CROSSREFS

Main diagonal of A208021.

Cf. A212208, A212209.

Sequence in context: A028535 A108094 A162007 * A317476 A290643 A104844

Adjacent sequences:  A289133 A289134 A289135 * A289137 A289138 A289139

KEYWORD

nonn

AUTHOR

Andrew Howroyd, Jun 25 2017

STATUS

approved

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Last modified September 30 21:27 EDT 2020. Contains 337440 sequences. (Running on oeis4.)