A172107 - cp's OEIS frontend

A172107 Triangle T_3(n, m), the number of surjective multi-valued functions from {1, 1, 1, 2, 3, ..., n-2} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).

n	a(n)
1	0
2	0
3	0
4	1
5	2
6	1
7	1
8	6
9	9
10	4
11	1
12	14
13	45
14	52
15	20
16	1
17	30
18	177
19	388
20	360
21	120
22	1
23	62
24	621
25	2260
26	3740
27	2880
28	840
29	1
30	126
31	2049
32	11524
33	30000
34	39720
35	26040
36	6720
37	1
38	254
39	6525
40	54292
41	207620
42	418320
43	460320
44	262080
45	60480
46	1
47	510
48	20337
49	243268
50	1309560
51	3755640
52	6150480
53	5779200
54	2903040
55	604800

[0, 0, 0, 1, 2, 1, 1, 6, 9, 4, 1, 14, 45, 52, 20, 1, 30, 177, 388, 360, 120, 1, 62, 621, 2260, 3740, 2880, 840, 1, 126, 2049, 11524, 30000, 39720, 26040, 6720, 1, 254, 6525, 54292, 207620, 418320, 460320, 262080, 60480, 1, 510, 20337, 243268, 1309560, 3755640, 6150480, 5779200, 2903040, 604800]

cp's OEIS Frontend

A172107 Triangle T_3(n, m), the number of surjective multi-valued functions from {1, 1, 1, 2, 3, ..., n-2} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).

Table of values

List of values