A261764 - cp's OEIS frontend

A261764 Triangle read by rows: T(n,k) is the number of nilpotent subpermutations on an n-set, each of nilpotency index less than or equal to k.

n	a(n)
0	1
1	0
2	1
3	0
4	1
5	3
6	0
7	1
8	7
9	13
10	0
11	1
12	25
13	49
14	73
15	0
16	1
17	81
18	261
19	381
20	501
21	0
22	1
23	331
24	1531
25	2611
26	3331
27	4051
28	0
29	1
30	1303
31	9073
32	19993
33	27553
34	32593
35	37633
36	0
37	1
38	5937
39	63393
40	165873
41	253233
42	313713
43	354033
44	394353
45	0
46	1
47	26785
48	465769
49	1436473
50	2540233
51	3326473
52	3870793
53	4233673
54	4596553

[1, 0, 1, 0, 1, 3, 0, 1, 7, 13, 0, 1, 25, 49, 73, 0, 1, 81, 261, 381, 501, 0, 1, 331, 1531, 2611, 3331, 4051, 0, 1, 1303, 9073, 19993, 27553, 32593, 37633, 0, 1, 5937, 63393, 165873, 253233, 313713, 354033, 394353, 0, 1, 26785, 465769, 1436473, 2540233, 3326473, 3870793, 4233673, 4596553]

cp's OEIS Frontend

A261764 Triangle read by rows: T(n,k) is the number of nilpotent subpermutations on an n-set, each of nilpotency index less than or equal to k.

Table of values

List of values