A331713 - cp's OEIS frontend

A331713 Number of nonnegative integer matrices with pairwise distinct nonzero rows, the total sum of elements equal n, the same sum of elements in each column, and the columns coming in nonincreasing lexicographic order.

n	a(n)
1	1
2	3
3	7
4	18
5	21
6	147
7	77
8	1119
9	2270
10	12273
11	1089
12	464200
13	4229
14	4148223
15	32941976
16	159812905
17	66153
18	10211281004
19	263321
20	205923976532
21	2439257062679
22	3086915165084
23	4199061
24	1526043270802300
25	311419986358517
26	4817701809545446
27	621665561741298232
28	1898993198795136209

[1, 3, 7, 18, 21, 147, 77, 1119, 2270, 12273, 1089, 464200, 4229, 4148223, 32941976, 159812905, 66153, 10211281004, 263321, 205923976532, 2439257062679, 3086915165084, 4199061, 1526043270802300, 311419986358517, 4817701809545446, 621665561741298232, 1898993198795136209]

cp's OEIS Frontend

A331713 Number of nonnegative integer matrices with pairwise distinct nonzero rows, the total sum of elements equal n, the same sum of elements in each column, and the columns coming in nonincreasing lexicographic order.

Table of values

List of values