A201685 - cp's OEIS frontend

A201685 Triangular array read by rows. T(n,k) is the number of connected endofunctions on {1,2,...,n} that have exactly k nodes in the unique cycle of its digraph representation.

n	a(n)
1	1
2	2
3	1
4	9
5	6
6	2
7	64
8	48
9	24
10	6
11	625
12	500
13	300
14	120
15	24
16	7776
17	6480
18	4320
19	2160
20	720
21	120
22	117649
23	100842
24	72030
25	41160
26	17640
27	5040
28	720
29	2097152
30	1835008
31	1376256
32	860160
33	430080
34	161280
35	40320
36	5040
37	43046721
38	38263752
39	29760696
40	19840464
41	11022480
42	4898880
43	1632960
44	362880
45	40320

[1, 2, 1, 9, 6, 2, 64, 48, 24, 6, 625, 500, 300, 120, 24, 7776, 6480, 4320, 2160, 720, 120, 117649, 100842, 72030, 41160, 17640, 5040, 720, 2097152, 1835008, 1376256, 860160, 430080, 161280, 40320, 5040, 43046721, 38263752, 29760696, 19840464, 11022480, 4898880, 1632960, 362880, 40320]

cp's OEIS Frontend

A201685 Triangular array read by rows. T(n,k) is the number of connected endofunctions on {1,2,...,n} that have exactly k nodes in the unique cycle of its digraph representation.

Table of values

List of values