A203092 - cp's OEIS frontend

A203092 Triangular array read by rows. T(n,k) is the number of partial functions on {1,2,...,n} that are endofunctions with no cycles of length > 1 that have exactly k components.

n	a(n)
0	1
1	1
2	1
3	1
4	4
5	1
6	1
7	18
8	9
9	1
10	1
11	116
12	78
13	16
14	1
15	1
16	1060
17	810
18	220
19	25
20	1
21	1
22	12702
23	10335
24	3260
25	495
26	36
27	1
28	1
29	187810
30	158613
31	54740
32	9835
33	966
34	49
35	1
36	1
37	3296120
38	2854908
39	1046024
40	209510
41	24696
42	1708
43	64
44	1

[1, 1, 1, 1, 4, 1, 1, 18, 9, 1, 1, 116, 78, 16, 1, 1, 1060, 810, 220, 25, 1, 1, 12702, 10335, 3260, 495, 36, 1, 1, 187810, 158613, 54740, 9835, 966, 49, 1, 1, 3296120, 2854908, 1046024, 209510, 24696, 1708, 64, 1]

cp's OEIS Frontend

A203092 Triangular array read by rows. T(n,k) is the number of partial functions on {1,2,...,n} that are endofunctions with no cycles of length > 1 that have exactly k components.

Table of values

List of values