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A145251 1/8 of the number of 8-colorings of an n X n array symmetric about main diagonal. 0
1, 49, 14749, 27270901, 309747333007, 21611597821416253, 9262695628779625138057, 24387041941030585188110420941, 394413773105599656230374829245322143 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A194023 A195273 A222459 * A202991 A203061 A013741

Adjacent sequences:  A145248 A145249 A145250 * A145252 A145253 A145254

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 05 2008

STATUS

approved

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Last modified October 17 12:01 EDT 2018. Contains 316279 sequences. (Running on oeis4.)