A171822 - cp's OEIS frontend

A171822 Triangle T(n,k) = binomial(2n-k, k)binomial(n+k, 2*k), read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	9
5	1
6	1
7	30
8	30
9	1
10	1
11	70
12	225
13	70
14	1
15	1
16	135
17	980
18	980
19	135
20	1
21	1
22	231
23	3150
24	7056
25	3150
26	231
27	1
28	1
29	364
30	8316
31	34650
32	34650
33	8316
34	364
35	1
36	1
37	540
38	19110
39	132132
40	245025
41	132132
42	19110
43	540
44	1
45	1
46	765
47	39600
48	420420
49	1288287
50	1288287
51	420420
52	39600
53	765
54	1

[1, 1, 1, 1, 9, 1, 1, 30, 30, 1, 1, 70, 225, 70, 1, 1, 135, 980, 980, 135, 1, 1, 231, 3150, 7056, 3150, 231, 1, 1, 364, 8316, 34650, 34650, 8316, 364, 1, 1, 540, 19110, 132132, 245025, 132132, 19110, 540, 1, 1, 765, 39600, 420420, 1288287, 1288287, 420420, 39600, 765, 1]

cp's OEIS Frontend

A171822 Triangle T(n,k) = binomial(2n-k, k)binomial(n+k, 2*k), read by rows.

Table of values

List of values

cp's OEIS Frontend

A171822 Triangle T(n,k) = binomial(2*n-k, k)*binomial(n+k, 2*k), read by rows.

Table of values

List of values

A171822 Triangle T(n,k) = binomial(2n-k, k)binomial(n+k, 2*k), read by rows.