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A068302 1/13 the number of colorings of an n X n octagonal array with 13 colors. 1
1, 1320, 146520000, 1368698694000000, 1075984617953259154800000, 71185491858527630409715040263200000, 396336553255260873925931533264339353950473200000, 185705162149755607151153966767311643039842133737264420356400000 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 17 04:33 EDT 2022. Contains 353730 sequences. (Running on oeis4.)