A172089 - cp's OEIS frontend

A172089 Triangle T(n,m) = n!/(m!!*(n-m)!!) read by rows, where (.)!! = A006882(.) are double factorials.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	2
7	3
8	3
9	2
10	3
11	8
12	6
13	8
14	3
15	8
16	15
17	20
18	20
19	15
20	8
21	15
22	48
23	45
24	80
25	45
26	48
27	15
28	48
29	105
30	168
31	210
32	210
33	168
34	105
35	48
36	105
37	384
38	420
39	896
40	630
41	896
42	420
43	384
44	105
45	384
46	945
47	1728
48	2520
49	3024
50	3024
51	2520
52	1728
53	945
54	384
55	945
56	3840
57	4725
58	11520
59	9450
60	16128
61	9450
62	11520
63	4725
64	3840
65	945

[1, 1, 1, 1, 2, 1, 2, 3, 3, 2, 3, 8, 6, 8, 3, 8, 15, 20, 20, 15, 8, 15, 48, 45, 80, 45, 48, 15, 48, 105, 168, 210, 210, 168, 105, 48, 105, 384, 420, 896, 630, 896, 420, 384, 105, 384, 945, 1728, 2520, 3024, 3024, 2520, 1728, 945, 384, 945, 3840, 4725, 11520, 9450, 16128, 9450, 11520, 4725, 3840, 945]

cp's OEIS Frontend

A172089 Triangle T(n,m) = n!/(m!!*(n-m)!!) read by rows, where (.)!! = A006882(.) are double factorials.

Table of values

List of values