A189913 - cp's OEIS frontend

A189913 Triangle read by rows: T(n,k) = binomial(n, k) * k! / (floor(k/2)! * floor((k+2)/2)!).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	3
10	1
11	4
12	6
13	12
14	2
15	1
16	5
17	10
18	30
19	10
20	10
21	1
22	6
23	15
24	60
25	30
26	60
27	5
28	1
29	7
30	21
31	105
32	70
33	210
34	35
35	35
36	1
37	8
38	28
39	168
40	140
41	560
42	140
43	280
44	14
45	1
46	9
47	36
48	252
49	252
50	1260
51	420
52	1260
53	126
54	126
55	1
56	10
57	45
58	360
59	420
60	2520
61	1050
62	4200
63	630
64	1260
65	42

[1, 1, 1, 1, 2, 1, 1, 3, 3, 3, 1, 4, 6, 12, 2, 1, 5, 10, 30, 10, 10, 1, 6, 15, 60, 30, 60, 5, 1, 7, 21, 105, 70, 210, 35, 35, 1, 8, 28, 168, 140, 560, 140, 280, 14, 1, 9, 36, 252, 252, 1260, 420, 1260, 126, 126, 1, 10, 45, 360, 420, 2520, 1050, 4200, 630, 1260, 42]

cp's OEIS Frontend

A189913 Triangle read by rows: T(n,k) = binomial(n, k) * k! / (floor(k/2)! * floor((k+2)/2)!).

Table of values

List of values