A068302 1/13 the number of colorings of an n X n octagonal array with 13 colors.

1, 1320, 146520000, 1368698694000000, 1075984617953259154800000, 71185491858527630409715040263200000, 396336553255260873925931533264339353950473200000, 185705162149755607151153966767311643039842133737264420356400000

Offset

1,2

Links

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

Crossrefs

Cf. A068239-A068305, A000332, A002417, A027441, A212208, A212209.

Sequence in context: A013641 A295449 A092088 * A139666 A186469 A145754

Adjacent sequences: A068299 A068300 A068301 * A068303 A068304 A068305

Keyword

nonn

Author

R. H. Hardin, Feb 24 2002

Extensions

a(5)-a(8) from Alois P. Heinz, May 04 2012

Status

approved