References to A000516

Number of equivalence classes of n X n matrices over {0,1} with rows and columns summing to 5, where equivalence is defined by row and column permutations. Isomorphism classes of bicolored 5-regular bipartite graphs, where isomorphism cannot exchange the colors.
0, 0, 0, 0, 1, 1, 4, 51, 3529, 601055, 15647384

2 seqfan posts

Mon Mar 26 02:03:29 CEST 2012    [seqfan] Re: nxn grids colored black and white
Mon Mar 26 01:33:48 CEST 2012    [seqfan] nxn grids colored black and white

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