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A145261 1/10 of the number of 10-colorings of an n X n array symmetric about main diagonal. 0
1, 81, 53217, 283593393, 12258075782601, 4297629494449269153, 12221263772988733500680961, 281892642133040615422671776068833, 52738993750936114896985550720064788375625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Sequence in context: A088188 A017560 A128493 * A013745 A093227 A187751

Adjacent sequences:  A145258 A145259 A145260 * A145262 A145263 A145264

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 05 2008

STATUS

approved

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Last modified August 11 19:16 EDT 2020. Contains 336428 sequences. (Running on oeis4.)