A172108 - cp's OEIS frontend

A172108 Triangle T_4(n, m), the number of surjective multi-valued functions from {1, 1, 1, 1, 2, 3, ..., n-3} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	3
9	3
10	1
11	1
12	8
13	18
14	16
15	5
16	1
17	18
18	78
19	136
20	105
21	30
22	1
23	38
24	288
25	856
26	1205
27	810
28	210
29	1
30	78
31	978
32	4576
33	10305
34	12090
35	7140
36	1680
37	1
38	158
39	3168
40	22216
41	74405
42	134370
43	134610
44	70560
45	15120
46	1
47	318
48	9978
49	101536
50	483105
51	1252650
52	1882860
53	1641360
54	771120
55	151200

[0, 0, 0, 0, 0, 0, 1, 3, 3, 1, 1, 8, 18, 16, 5, 1, 18, 78, 136, 105, 30, 1, 38, 288, 856, 1205, 810, 210, 1, 78, 978, 4576, 10305, 12090, 7140, 1680, 1, 158, 3168, 22216, 74405, 134370, 134610, 70560, 15120, 1, 318, 9978, 101536, 483105, 1252650, 1882860, 1641360, 771120, 151200]

cp's OEIS Frontend

A172108 Triangle T_4(n, m), the number of surjective multi-valued functions from {1, 1, 1, 1, 2, 3, ..., n-3} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).

Table of values

List of values