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A287053 Number of perfect matchings in the graph P_2 X P_9 X P_n. 2
1, 55, 87362, 54003765, 43402320448, 32567565264292, 24976513162427653, 19056798015394695543, 14569902220123180849570, 11135886394033736561250816, 8513244230416326065909810345, 6508281831123403112229534915956, 4975689584055269435866523080540937 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..120

Eric Weisstein's World of Mathematics, Perfect Matching

Wikipedia, Matching (graph theory)

CROSSREFS

Column k=9 of A181206.

Sequence in context: A231907 A027580 A265980 * A046194 A172808 A243315

Adjacent sequences:  A287050 A287051 A287052 * A287054 A287055 A287056

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 18 2017

STATUS

approved

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Last modified October 1 06:00 EDT 2020. Contains 337442 sequences. (Running on oeis4.)