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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
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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 April 18 18:49 EDT 2024. Contains 371781 sequences. (Running on oeis4.)