A172586 Number of 5*n X n 0..1 arrays with row sums 2 and column sums 10.

0, 1, 756756, 25989269017140, 9647422924194982967040, 24935177268489106332174087326700, 329566582178898535416815000275618647613440

Offset

1,3

References

Gao, Shanzhen, and Matheis, Kenneth, Closed formulas and integer sequences arising from the enumeration of (0,1)-matrices with row sum two and some constant column sums. In Proceedings of the Forty-First Southeastern International Conference on Combinatorics, Graph Theory and Computing. Congr. Numer. 202 (2010), 45-53.

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Crossrefs

Sequence in context: A244308 A273971 A259305 * A172571 A172670 A172769

Adjacent sequences: A172583 A172584 A172585 * A172587 A172588 A172589

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved