A172608 Number of 7*n X 7 0..1 arrays with row sums 3 and column sums 3*n.

68938800, 617944896216648000, 12218892645550878420052920000, 337799058758556439723480176591336120000, 11251027489082268563385494644966780470231583948800

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n=1..13

Crossrefs

Sequence in context: A321706 A393667 A388027 * A294989 A204405 A186618

Adjacent sequences: A172605 A172606 A172607 * A172609 A172610 A172611

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved