A000512 - cp's OEIS frontend

A000512 Number of equivalence classes of n X n matrices over {0,1} with rows and columns summing to 3, where equivalence is defined by row and column permutations.

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	7
7	16
8	51
9	224
10	1165
11	7454
12	56349
13	481309
14	4548786
15	46829325
16	519812910
17	6177695783
18	78190425826
19	1049510787100
20	14886252250208
21	222442888670708
22	3492326723315796
23	57468395960854710
24	989052970923320185
25	17767732298980160822
26	332572885090541084172
27	6475438355244504235759
28	130954580036269713385884

[0, 0, 1, 1, 2, 7, 16, 51, 224, 1165, 7454, 56349, 481309, 4548786, 46829325, 519812910, 6177695783, 78190425826, 1049510787100, 14886252250208, 222442888670708, 3492326723315796, 57468395960854710, 989052970923320185, 17767732298980160822, 332572885090541084172, 6475438355244504235759, 130954580036269713385884]

cp's OEIS Frontend

A000512 Number of equivalence classes of n X n matrices over {0,1} with rows and columns summing to 3, where equivalence is defined by row and column permutations.

Table of values

List of values