A321732 - cp's OEIS frontend

A321732 Number of nonnegative integer square matrices with sum of entries equal to n, no zero rows or columns, and the same row sums as column sums.

n	a(n)
0	1
1	1
2	3
3	11
4	53
5	317
6	2293
7	19435
8	188851
9	2068417
10	25203807
11	338117445
12	4951449055
13	78589443061
14	1343810727205
15	24626270763109
16	481489261372381
17	10004230113283129
18	220125503239710879
19	5113204953106107087
20	125037079246130168973

[1, 1, 3, 11, 53, 317, 2293, 19435, 188851, 2068417, 25203807, 338117445, 4951449055, 78589443061, 1343810727205, 24626270763109, 481489261372381, 10004230113283129, 220125503239710879, 5113204953106107087, 125037079246130168973]

cp's OEIS Frontend

A321732 Number of nonnegative integer square matrices with sum of entries equal to n, no zero rows or columns, and the same row sums as column sums.

Table of values

List of values