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A145243
1/5 of the number of 5-colorings of an n X n array symmetric about main diagonal.
0
1, 16, 832, 140608, 77237056, 137903978368, 800322197224576, 15096986903075017408, 925663484222785115317120, 184481765105295751384134480832, 119506416478168389428808558526416256
OFFSET
1,2
CROSSREFS
Sequence in context: A166187 A363988 A223113 * A264125 A272468 A214386
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 05 2008
STATUS
approved