A068262 1/12 the number of colorings of an n X n square array with 12 colors.

1, 1221, 151807051, 1921891513498671, 2477572888040351900883711, 325225549604893753518411953062063971, 4347138911747232969546330930965884363451764385131, 5916747359191672857470732990313720758880725307188900212460107911

Offset

1,2

Links

Table of n, a(n) for n=1..8.

Crossrefs

Cf. A068239-A068305, A000332, A002417, A027441, A182368, A182406.

Sequence in context: A179140 A091790 A053655 * A328991 A223118 A128655

Adjacent sequences: A068259 A068260 A068261 * A068263 A068264 A068265

Keyword

nonn

Author

R. H. Hardin, Feb 24 2002

Extensions

a(5)-a(8) from Alois P. Heinz, Apr 27 2012

Status

approved