cp's OEIS Frontend

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.

%I A000516 #16 Apr 01 2020 14:27:14
%S A000516 0,0,0,0,1,1,4,51,3529,601055,156473848,54062069505,23869437984682,
%T A000516 13186966476208771,8971034249976338907,7414924597575224629299,
%U A000516 7360058177440420943520750,8683626883245180573511018830,12066478410398147578519948851818,19585444567548740264243478805318202
%N 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.
%H A000516 <a href="/index/La#Latin">Index entries for sequences related to Latin squares and rectangles</a>
%Y A000516 Column k=5 of A133687.
%Y A000516 Cf. A000512, A000513.
%K A000516 nonn
%O A000516 1,7
%A A000516 Eric Rogoyski
%E A000516 Definition corrected by _Brendan McKay_, May 28 2006
%E A000516 Offset corrected and terms a(12) and beyond from _Andrew Howroyd_, Apr 01 2020