A172559 Number of 2*n X 14 binary arrays with row sums 7 and column sums n.

1, 3432, 936369720, 1026608414145600, 2128370421607383353400, 6368685647203261761403856832, 24197157773366540262083203214418624, 108738182111446498614705217754614976371200, 553419789083994907139302477834526824481001555000

Offset

0,2

Links

Christoph Koutschan, Table of n, a(n) for n = 0..30 (terms n=1..16 from R. H. Hardin)

Robert Dougherty-Bliss, Christoph Koutschan, Natalya Ter-Saakov, and Doron Zeilberger, The (Symbolic and Numeric) Computational Challenges of Counting 0-1 Balanced Matrices, arXiv:2410.07435 [math.CO], 2024.

Crossrefs

Column k=7 of A376935.

Sequence in context: A177308 A177309 A172603 * A172658 A172757 A172832

Adjacent sequences: A172556 A172557 A172558 * A172560 A172561 A172562

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Extensions

a(0)=1 prepended by Andrew Howroyd, Oct 12 2024

Status

approved