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A264741
Number of colorings of an n X n grid with at most three interchangeable colors under rotational and reflectional symmetry.
3
1, 1, 6, 490, 901012, 17653123147, 3126972103187548, 4985402694248850150928, 71535079589434063488162675274, 9238051838396620455005158025879826301, 10737031681916902729933722097695167945304711946, 112313143744651950650823741924955687289755947171340131550
OFFSET
0,3
REFERENCES
F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973.
CROSSREFS
KEYWORD
nonn
AUTHOR
Marko Riedel, Nov 22 2015
STATUS
approved