A208437 - cp's OEIS frontend

A208437 Triangular array read by rows: T(n,k) is the number of set partitions of {1,2,...,n} that have exactly k distinct block sizes.

n	a(n)
1	1
2	2
3	2
4	3
5	5
6	10
7	2
8	50
9	27
10	116
11	60
12	2
13	560
14	315
15	142
16	1730
17	2268
18	282
19	6123
20	14742
21	1073
22	30122
23	72180
24	12600
25	2
26	116908
27	464640
28	97020
29	32034
30	507277
31	2676366
32	997920
33	2
34	2492737
35	16400098
36	8751600
37	136853
38	15328119
39	94209206
40	81225144
41	1527528
42	56182092
43	673282610
44	614128515
45	37837800

[1, 2, 2, 3, 5, 10, 2, 50, 27, 116, 60, 2, 560, 315, 142, 1730, 2268, 282, 6123, 14742, 1073, 30122, 72180, 12600, 2, 116908, 464640, 97020, 32034, 507277, 2676366, 997920, 2, 2492737, 16400098, 8751600, 136853, 15328119, 94209206, 81225144, 1527528, 56182092, 673282610, 614128515, 37837800]

cp's OEIS Frontend

A208437 Triangular array read by rows: T(n,k) is the number of set partitions of {1,2,...,n} that have exactly k distinct block sizes.

Table of values

List of values