A172550 Number of 2*n X n 0..1 arrays with row sums 9 and column sums 18.

0, 0, 0, 0, 0, 0, 0, 0, 1, 2375880867360000, 86574740102712303011539719750000, 3113598948052994576761792558312393011168670080000, 177115577520155240531744027851206753629735074356474328692651750000

Offset

1,10

Links

R. H. Hardin, Table of n, a(n) for n=1..14

Crossrefs

Sequence in context: A058445 A290540 A132910 * A216908 A080126 A335394

Adjacent sequences: A172547 A172548 A172549 * A172551 A172552 A172553

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved