A068258 - OEIS

A068258

1/8 the number of colorings of an n X n square array with 8 colors.

1, 301, 3418807, 1465295106499, 23698346512668445387, 14462834689097706163375677127, 333066712033498255371201983520013525951, 289435280548175417311368841643540798029239265418611, 9491047284937011500293532002379383630495589849878668222747216079

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

OFFSET

1,2

LINKS

Jean-François Alcover, Table of n, a(n) for n = 1..12

MATHEMATICA

A222462 = Cases[Import["https://oeis.org/A222462/b222462.txt", "Table"], {_, _}][[All, 2]];

a[n_] := A222462[[2 n^2 - 2 n + 1]];

Table[a[n], {n, 1, 12}] (* Jean-François Alcover, Sep 23 2019 *)

CROSSREFS

Main diagonal of A222462.

Cf. A068239-A068305, A000332, A002417, A027441, A182368, A182406.

Sequence in context: A296961 A028499 A145123 * A075407 A258449 A261677

Adjacent sequences: A068255 A068256 A068257 * A068259 A068260 A068261

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 24 2002

EXTENSIONS

a(6)-a(9) from Alois P. Heinz, Apr 27 2012

STATUS

approved