A172627 Number of n X n 0..2 arrays with row sums 6 and column sums 6

0, 0, 1, 282, 628080, 3680774301, 49846153939785, 1418365816378741440, 78459796857685317493440, 7915651642356094020231766800, 1381222121393845839281152868103600

Offset

1,4

Links

R. H. Hardin, Table of n, a(n) for n=1..25

Crossrefs

Sequence in context: A345704 A224115 A248459 * A172725 A172804 A340160

Adjacent sequences: A172624 A172625 A172626 * A172628 A172629 A172630

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved