A137251 - cp's OEIS frontend

A137251 Triangle T(n,k) read by rows: number of k X k triangular matrices with nonnegative integer entries and without zero rows or columns such that sum of all entries is equal to n, n>=1, 1<=k<=n.

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	6
9	7
10	1
11	1
12	10
13	26
14	15
15	1
16	1
17	15
18	71
19	98
20	31
21	1
22	1
23	21
24	161
25	425
26	342
27	63
28	1
29	1
30	28
31	322
32	1433
33	2285
34	1138
35	127
36	1
37	1
38	36
39	588
40	4066
41	11210
42	11413
43	3670
44	255
45	1
46	1
47	45
48	1002
49	10165
50	44443
51	79781
52	54073
53	11586
54	511
55	1
56	1
57	55
58	1617
59	23056
60	150546
61	434638
62	528690
63	246409
64	36038
65	1023
66	1

[1, 1, 1, 1, 3, 1, 1, 6, 7, 1, 1, 10, 26, 15, 1, 1, 15, 71, 98, 31, 1, 1, 21, 161, 425, 342, 63, 1, 1, 28, 322, 1433, 2285, 1138, 127, 1, 1, 36, 588, 4066, 11210, 11413, 3670, 255, 1, 1, 45, 1002, 10165, 44443, 79781, 54073, 11586, 511, 1, 1, 55, 1617, 23056, 150546, 434638, 528690, 246409, 36038, 1023, 1]

cp's OEIS Frontend

A137251 Triangle T(n,k) read by rows: number of k X k triangular matrices with nonnegative integer entries and without zero rows or columns such that sum of all entries is equal to n, n>=1, 1<=k<=n.

Table of values

List of values