A185070 - cp's OEIS frontend

A185070 Triangular array read by rows. T(n,k) is the number of functions f:{1,2,...,n}->{1,2,...,n} that have exactly k 3-cycles. n>=0, 0<=k<=floor(n/3).

n	a(n)
0	1
1	1
2	4
3	25
4	2
5	224
6	32
7	2625
8	500
9	38056
10	8560
11	40
12	657433
13	164150
14	1960
15	13178880
16	3526656
17	71680
18	300585601
19	84389928
20	2442720
21	2240
22	7683776000
23	2232672000
24	83328000
25	224000
26	217534555161
27	64830707370
28	2931500880
29	14907200

[1, 1, 4, 25, 2, 224, 32, 2625, 500, 38056, 8560, 40, 657433, 164150, 1960, 13178880, 3526656, 71680, 300585601, 84389928, 2442720, 2240, 7683776000, 2232672000, 83328000, 224000, 217534555161, 64830707370, 2931500880, 14907200]

cp's OEIS Frontend

A185070 Triangular array read by rows. T(n,k) is the number of functions f:{1,2,...,n}->{1,2,...,n} that have exactly k 3-cycles. n>=0, 0<=k<=floor(n/3).

Table of values

List of values