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A068257
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1/7 the number of colorings of an n X n square array with 7 colors.
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3
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1, 186, 923526, 122408393436, 433110977725751106, 40908457493732914322944536, 103146129375410533061371714364918916, 6942544711174164051575906086886643368922134556, 12474132532762777585883439690925675118905860580968258566406
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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A222340 = Cases[Import["https://oeis.org/A222340/b222340.txt", "Table"], {_, _}][[All, 2]];
a[n_] := A222340[[2 n^2 - 2 n + 1]];
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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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