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A058783 Number of n-rowed binary matrices with all row sums 4, up to row and column permutation; bipartite graphs with all nodes of degree 4 in a distinguished bipartite n-block, up to isomorphism. 9

%I

%S 1,1,5,30,332,6414,226041,12848128,1064292052,119252205304,

%T 17239075745190,3113843614322530,686491853010870156,

%U 181386885029173595218,56595769613704915215101,20597536264356706999502705,8652615103513713632218678155,4157673185369121151936091009448

%N Number of n-rowed binary matrices with all row sums 4, up to row and column permutation; bipartite graphs with all nodes of degree 4 in a distinguished bipartite n-block, up to isomorphism.

%H <a href="/A050535/a050535.pdf">Number of m-rowed binary matrices with all row sums equal to n, up to row and column permutation</a>

%Y Row n=4 of A331461.

%Y Cf. A050535, A050913, A058784, A058785.

%K nonn

%O 0,3

%A _Vladeta Jovovic_, Nov 28 2000

%E Terms a(8)-a(17) from _Max Alekseyev_, May 04 2018

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Last modified February 25 20:04 EST 2020. Contains 332258 sequences. (Running on oeis4.)