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A287153 Number of matchings in the graph P_2 X P_n X P_n. 1
1, 2, 108, 90040, 1441534384, 423657524608288, 2303329608950881340608, 231357371294195870227169041024, 429425508267098531071850722486436668160 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..8.

Wikipedia, Matching (graph theory)

FORMULA

a(n) = Sum_{k=0..n^2} A287152(n,k).

CROSSREFS

Row sums of A287152.

Sequence in context: A156502 A111456 A157067 * A247098 A245056 A023281

Adjacent sequences:  A287150 A287151 A287152 * A287154 A287155 A287156

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 20 2017

STATUS

approved

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Last modified April 20 16:23 EDT 2021. Contains 343135 sequences. (Running on oeis4.)