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A172649 Number of 2*n X n 0..2 arrays with row sums 3 and column sums 6 1
0, 6, 5881, 34145664, 755265546000, 50432680389260400, 8610740229284196003000, 3321735626954282018581900800, 2631822682451717147804985743769600, 3970498303510674585925708059712525440000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..41

CROSSREFS

Sequence in context: A116135 A011788 A320446 * A111152 A202969 A003191

Adjacent sequences:  A172646 A172647 A172648 * A172650 A172651 A172652

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified May 26 15:15 EDT 2019. Contains 323596 sequences. (Running on oeis4.)