A000516 - 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.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	4
8	51
9	3529
10	601055
11	156473848
12	54062069505
13	23869437984682
14	13186966476208771
15	8971034249976338907
16	7414924597575224629299
17	7360058177440420943520750
18	8683626883245180573511018830
19	12066478410398147578519948851818
20	19585444567548740264243478805318202

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

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.

Table of values

List of values