A190909 - cp's OEIS frontend

A190909 Triangle read by rows: T(n,k) = binomial(n+k,n-k) * k! / floor(k/2)!^2.

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	2
6	1
7	6
8	10
9	6
10	1
11	10
12	30
13	42
14	6
15	1
16	15
17	70
18	168
19	54
20	30
21	1
22	21
23	140
24	504
25	270
26	330
27	20
28	1
29	28
30	252
31	1260
32	990
33	1980
34	260
35	140
36	1
37	36
38	420
39	2772
40	2970
41	8580
42	1820
43	2100
44	70
45	1
46	45
47	660
48	5544
49	7722
50	30030
51	9100
52	16800
53	1190
54	630

[1, 1, 1, 1, 3, 2, 1, 6, 10, 6, 1, 10, 30, 42, 6, 1, 15, 70, 168, 54, 30, 1, 21, 140, 504, 270, 330, 20, 1, 28, 252, 1260, 990, 1980, 260, 140, 1, 36, 420, 2772, 2970, 8580, 1820, 2100, 70, 1, 45, 660, 5544, 7722, 30030, 9100, 16800, 1190, 630]

cp's OEIS Frontend

A190909 Triangle read by rows: T(n,k) = binomial(n+k,n-k) * k! / floor(k/2)!^2.

Table of values

List of values