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A145250
1/7 of the number of 7-colorings of an n X n array symmetric under 180 degree rotation.
0
1, 6, 966, 153996, 661773786, 2815356109536, 322956657504465996, 36676462296254099505756
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..8.
CROSSREFS
Sequence in context:
A263423
A266598
A250392
*
A332196
A024085
A080474
Adjacent sequences:
A145247
A145248
A145249
*
A145251
A145252
A145253
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Oct 05 2008
STATUS
approved
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Last modified April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)