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A047943
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Number of 8-colorings of an n X n grid, up to rotational symmetry.
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3
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1, 8, 1044, 33562880, 70368748374016, 9444732965876730429440, 81129638414606686199388699623424, 44601490397061246283080881278262737180295168, 1569275433846670190958947355821723644654155086251882971136
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = (m^(n^2) + 2 m^((n^2 + 3 (n mod 2))/4) + m^((n^2 + (n mod 2))/2))/4, with m = 8.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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