A056860 - cp's OEIS frontend

A056860 Triangle T(n,k) = number of element-subset partitions of {1..n} with n-k+1 equalities (n >= 1, 1 <= k <= n).

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	2
7	1
8	3
9	6
10	5
11	1
12	4
13	12
14	20
15	15
16	1
17	5
18	20
19	50
20	75
21	52
22	1
23	6
24	30
25	100
26	225
27	312
28	203
29	1
30	7
31	42
32	175
33	525
34	1092
35	1421
36	877
37	1
38	8
39	56
40	280
41	1050
42	2912
43	5684
44	7016
45	4140
46	1
47	9
48	72
49	420
50	1890
51	6552
52	17052
53	31572
54	37260
55	21147

[1, 1, 1, 1, 2, 2, 1, 3, 6, 5, 1, 4, 12, 20, 15, 1, 5, 20, 50, 75, 52, 1, 6, 30, 100, 225, 312, 203, 1, 7, 42, 175, 525, 1092, 1421, 877, 1, 8, 56, 280, 1050, 2912, 5684, 7016, 4140, 1, 9, 72, 420, 1890, 6552, 17052, 31572, 37260, 21147]

cp's OEIS Frontend

A056860 Triangle T(n,k) = number of element-subset partitions of {1..n} with n-k+1 equalities (n >= 1, 1 <= k <= n).

Table of values

List of values