A225723 - cp's OEIS frontend

A225723 Triangular array read by rows: T(n,k) is the number of size k components in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}; n>=1, 1<=k<=n.

n	a(n)
1	1
2	2
3	3
4	12
5	9
6	17
7	108
8	72
9	68
10	142
11	1280
12	810
13	680
14	710
15	1569
16	18750
17	11520
18	9180
19	8520
20	9414
21	21576
22	326592
23	196875
24	152320
25	134190
26	131796
27	151032
28	355081
29	6588344
30	3919104
31	2975000
32	2544640
33	2372328
34	2416512
35	2840648
36	6805296

[1, 2, 3, 12, 9, 17, 108, 72, 68, 142, 1280, 810, 680, 710, 1569, 18750, 11520, 9180, 8520, 9414, 21576, 326592, 196875, 152320, 134190, 131796, 151032, 355081, 6588344, 3919104, 2975000, 2544640, 2372328, 2416512, 2840648, 6805296]

cp's OEIS Frontend

A225723 Triangular array read by rows: T(n,k) is the number of size k components in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}; n>=1, 1<=k<=n.

Table of values

List of values