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A145263
1/10 of the number of 10-colorings of an n X n array symmetric under 180 degree rotation.
0
1, 9, 5337, 3155553, 123107175225, 4788563588080785
OFFSET
1,2
CROSSREFS
Sequence in context: A167064 A125541 A151581 * A185821 A133248 A125542
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 05 2008
STATUS
approved