A145243 1/5 of the number of 5-colorings of an n X n array symmetric about main diagonal.

1, 16, 832, 140608, 77237056, 137903978368, 800322197224576, 15096986903075017408, 925663484222785115317120, 184481765105295751384134480832, 119506416478168389428808558526416256

Offset

1,2

Links

Table of n, a(n) for n=1..11.

Crossrefs

Sequence in context: A166187 A363988 A223113 * A264125 A272468 A214386

Adjacent sequences: A145240 A145241 A145242 * A145244 A145245 A145246

Keyword

nonn

Author

R. H. Hardin, Oct 05 2008

Status

approved