A172106 - cp's OEIS frontend

A172106 The triangle T_2(n, m), where T_2(n, m) is the number of surjective multi-valued functions from {1, 1, 2, 3, ..., n-1} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).

n	a(n)
1	0
2	1
3	1
4	1
5	4
6	3
7	1
8	10
9	21
10	12
11	1
12	22
13	93
14	132
15	60
16	1
17	46
18	345
19	900
20	960
21	360
22	1
23	94
24	1173
25	4980
26	9300
27	7920
28	2520
29	1
30	190
31	3801
32	24612
33	71400
34	103320
35	73080
36	20160
37	1
38	382
39	11973
40	113652
41	480060
42	1048320
43	1234800
44	745920
45	181440
46	1
47	766
48	37065
49	502500
50	2968560
51	9170280
52	15981840
53	15845760
54	8346240
55	1814400

[0, 1, 1, 1, 4, 3, 1, 10, 21, 12, 1, 22, 93, 132, 60, 1, 46, 345, 900, 960, 360, 1, 94, 1173, 4980, 9300, 7920, 2520, 1, 190, 3801, 24612, 71400, 103320, 73080, 20160, 1, 382, 11973, 113652, 480060, 1048320, 1234800, 745920, 181440, 1, 766, 37065, 502500, 2968560, 9170280, 15981840, 15845760, 8346240, 1814400]

cp's OEIS Frontend

A172106 The triangle T_2(n, m), where T_2(n, m) is the number of surjective multi-valued functions from {1, 1, 2, 3, ..., n-1} to {1, 2, 3, ..., m} by rows (n >= 1, 1 <= m <= n).

Table of values

List of values