A101819 - cp's OEIS frontend

A101819 Triangle read by rows: T(n,h) = number of functions f:{1,2,...,n}->{1,2,...,n-1} such that |Image(f)|=h, h=1,2,...,n-1, n=2,3,...

n	a(n)
0	1
1	2
2	6
3	3
4	42
5	36
6	4
7	180
8	600
9	240
10	5
11	620
12	5400
13	7800
14	1800
15	6
16	1890
17	36120
18	12600
19	100800
20	15120
21	7
22	5334
23	202860
24	1428840
25	2646000
26	1340640
27	141120
28	8
29	14280
30	1016400
31	13053600
32	46710720
33	53343360
34	18627840
35	1451520
36	9
37	36792
38	4702320

[1, 2, 6, 3, 42, 36, 4, 180, 600, 240, 5, 620, 5400, 7800, 1800, 6, 1890, 36120, 12600, 100800, 15120, 7, 5334, 202860, 1428840, 2646000, 1340640, 141120, 8, 14280, 1016400, 13053600, 46710720, 53343360, 18627840, 1451520, 9, 36792, 4702320]

cp's OEIS Frontend

A101819 Triangle read by rows: T(n,h) = number of functions f:{1,2,...,n}->{1,2,...,n-1} such that |Image(f)|=h, h=1,2,...,n-1, n=2,3,...

Table of values

List of values