

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 5regular bipartite graphs, where isomorphism cannot exchange the colors.


3



0, 0, 0, 0, 1, 1, 4, 51, 3529, 601055, 156473848, 54062069505, 23869437984682, 13186966476208771, 8971034249976338907, 7414924597575224629299, 7360058177440420943520750, 8683626883245180573511018830, 12066478410398147578519948851818, 19585444567548740264243478805318202
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OFFSET

1,7


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR

Eric Rogoyski


EXTENSIONS

Offset corrected and terms a(12) and beyond from Andrew Howroyd, Apr 01 2020


STATUS

approved



