A245958 - cp's OEIS frontend

A245958 Number T(n,k) of endofunctions f on [n] satisfying f^3(i) = i for all i in [k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

n	a(n)
0	1
1	1
2	1
3	4
4	2
5	1
6	27
7	11
8	5
9	3
10	256
11	88
12	36
13	18
14	9
15	3125
16	925
17	335
18	141
19	57
20	21
21	46656
22	12096
23	3912
24	1440
25	516
26	186
27	81
28	823543
29	189679
30	55377
31	18279
32	6003
33	2079
34	837
35	351
36	16777216
37	3473408
38	924160
39	277824
40	84624
41	27672
42	10116
43	3690
44	1233

[1, 1, 1, 4, 2, 1, 27, 11, 5, 3, 256, 88, 36, 18, 9, 3125, 925, 335, 141, 57, 21, 46656, 12096, 3912, 1440, 516, 186, 81, 823543, 189679, 55377, 18279, 6003, 2079, 837, 351, 16777216, 3473408, 924160, 277824, 84624, 27672, 10116, 3690, 1233]

cp's OEIS Frontend

A245958 Number T(n,k) of endofunctions f on [n] satisfying f^3(i) = i for all i in [k]; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

List of values