A228534 - cp's OEIS frontend

A228534 Triangular array read by rows: T(n,k) is the number of functional digraphs on {1,2,...,n} such that every element is mapped to a recurrent element and there are exactly k cycles, n>=1, 1<=k<=n.

n	a(n)
1	1
2	3
3	1
4	11
5	9
6	1
7	58
8	71
9	18
10	1
11	409
12	620
13	245
14	30
15	1
16	3606
17	6274
18	3255
19	625
20	45
21	1
22	38149
23	73339
24	45724
25	11795
26	1330
27	63
28	1
29	470856
30	977780
31	697004
32	221529
33	33880
34	2506
35	84
36	1
37	6641793
38	14678712
39	11602394
40	4309956
41	823179
42	82908
43	4326
44	108
45	1

[1, 3, 1, 11, 9, 1, 58, 71, 18, 1, 409, 620, 245, 30, 1, 3606, 6274, 3255, 625, 45, 1, 38149, 73339, 45724, 11795, 1330, 63, 1, 470856, 977780, 697004, 221529, 33880, 2506, 84, 1, 6641793, 14678712, 11602394, 4309956, 823179, 82908, 4326, 108, 1]

cp's OEIS Frontend

A228534 Triangular array read by rows: T(n,k) is the number of functional digraphs on {1,2,...,n} such that every element is mapped to a recurrent element and there are exactly k cycles, n>=1, 1<=k<=n.

Table of values

List of values