A226505 - cp's OEIS frontend

A226505 Irregular triangle read by rows: T(n,k) = number of set partitions of [1..n] with intertwining weight k.

n	a(n)
0	1
1	1
2	2
3	5
4	14
5	1
6	42
7	9
8	1
9	132
10	55
11	14
12	2
13	429
14	286
15	120
16	35
17	6
18	1
19	1430
20	1365
21	819
22	364
23	119
24	35
25	7
26	1
27	4862
28	6188
29	4900
30	2940
31	1394
32	586
33	203
34	59
35	13
36	2
37	16796
38	27132
39	26928
40	20400
41	12576
42	6846
43	3246
44	1358
45	493
46	153
47	38
48	8
49	1

[1, 1, 2, 5, 14, 1, 42, 9, 1, 132, 55, 14, 2, 429, 286, 120, 35, 6, 1, 1430, 1365, 819, 364, 119, 35, 7, 1, 4862, 6188, 4900, 2940, 1394, 586, 203, 59, 13, 2, 16796, 27132, 26928, 20400, 12576, 6846, 3246, 1358, 493, 153, 38, 8, 1]

cp's OEIS Frontend

A226505 Irregular triangle read by rows: T(n,k) = number of set partitions of [1..n] with intertwining weight k.

Table of values

List of values