A269956 - cp's OEIS frontend

A269956 Triangle read by rows, T(n,k) = binomial(3*n,n+k) for n>=0 and 0<=k<=n.

n	a(n)
0	1
1	3
2	3
3	15
4	20
5	15
6	84
7	126
8	126
9	84
10	495
11	792
12	924
13	792
14	495
15	3003
16	5005
17	6435
18	6435
19	5005
20	3003
21	18564
22	31824
23	43758
24	48620
25	43758
26	31824
27	18564
28	116280
29	203490
30	293930
31	352716
32	352716
33	293930
34	203490
35	116280
36	735471
37	1307504
38	1961256
39	2496144
40	2704156
41	2496144
42	1961256
43	1307504
44	735471

[1, 3, 3, 15, 20, 15, 84, 126, 126, 84, 495, 792, 924, 792, 495, 3003, 5005, 6435, 6435, 5005, 3003, 18564, 31824, 43758, 48620, 43758, 31824, 18564, 116280, 203490, 293930, 352716, 352716, 293930, 203490, 116280, 735471, 1307504, 1961256, 2496144, 2704156, 2496144, 1961256, 1307504, 735471]

cp's OEIS Frontend

A269956 Triangle read by rows, T(n,k) = binomial(3*n,n+k) for n>=0 and 0<=k<=n.

Table of values

List of values