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

%I #15 Jan 22 2018 03:01:23

%S 0,1,756756,25989269017140,9647422924194982967040,

%T 24935177268489106332174087326700,

%U 329566582178898535416815000275618647613440

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

%D 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.

%H R. H. Hardin, <a href="/A172586/b172586.txt">Table of n, a(n) for n = 1..19</a>

%K nonn

%O 1,3

%A _R. H. Hardin_, Feb 06 2010

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Last modified July 11 18:58 EDT 2024. Contains 374234 sequences. (Running on oeis4.)