A328159 - cp's OEIS frontend

A328159 Number of n X n matrices (up to permutation of their rows and columns) with entries {0,1,2} with all row and column sums equal to 3.

n	a(n)
1	0
2	1
3	3
4	7
5	19
6	72
7	280
8	1348
9	7542
10	48290
11	348902
12	2805666
13	24797845
14	238678891
15	2482575930
16	27731295522
17	330955304428
18	4201424981020
19	56521276891669
20	803122164193328
21	12018137424023094
22	188906053776728602
23	3111632374404898304
24	53597059526977558291

[0, 1, 3, 7, 19, 72, 280, 1348, 7542, 48290, 348902, 2805666, 24797845, 238678891, 2482575930, 27731295522, 330955304428, 4201424981020, 56521276891669, 803122164193328, 12018137424023094, 188906053776728602, 3111632374404898304, 53597059526977558291]

cp's OEIS Frontend

A328159 Number of n X n matrices (up to permutation of their rows and columns) with entries {0,1,2} with all row and column sums equal to 3.

Table of values

List of values