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A068262
1/12 the number of colorings of an n X n square array with 12 colors.
1
1, 1221, 151807051, 1921891513498671, 2477572888040351900883711, 325225549604893753518411953062063971, 4347138911747232969546330930965884363451764385131, 5916747359191672857470732990313720758880725307188900212460107911
OFFSET
1,2
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
a(5)-a(8) from Alois P. Heinz, Apr 27 2012
STATUS
approved