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A289136
Number of colorings of the n X n king graph up to permutation of the colors.
4
1, 1, 270, 30066912, 3662498214110836, 978788002444637886853083440, 1017523795194980592656592864724960780556190, 6723457445689415320074916040888682277646129463792942126176174
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.
Sequence in context: A028535 A108094 A162007 * A317476 A290643 A104844
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jun 25 2017
STATUS
approved