A381842 - cp's OEIS frontend

A381842 Triangle read by rows: T(n,k) is the number of non-equivalent subsets of size k in S_n, 0 <= k <= n!.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	2
10	2
11	2
12	1
13	1
14	1
15	1
16	4
17	10
18	41
19	103
20	309
21	691
22	1458
23	2448
24	3703
25	4587
26	5050
27	4587
28	3703
29	2448
30	1458
31	691
32	309
33	103
34	41
35	10
36	4
37	1
38	1
39	1
40	1
41	6
42	37
43	715
44	13710
45	256751
46	4140666
47	58402198
48	726296995
49	8060937770
50	80604620206
51	732149722382

[1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 4, 10, 41, 103, 309, 691, 1458, 2448, 3703, 4587, 5050, 4587, 3703, 2448, 1458, 691, 309, 103, 41, 10, 4, 1, 1, 1, 1, 6, 37, 715, 13710, 256751, 4140666, 58402198, 726296995, 8060937770, 80604620206, 732149722382]

cp's OEIS Frontend

A381842 Triangle read by rows: T(n,k) is the number of non-equivalent subsets of size k in S_n, 0 <= k <= n!.

Table of values

List of values