A126953 - cp's OEIS frontend

A126953 Triangle T(n,k), 0 <= k <= n, read by rows given by: T(0,0)=1, T(n,k)=0 if k < 0 or if k > n, T(n,0) = 3*T(n-1,0) + T(n-1,1), T(n,k) = T(n-1,k-1) + T(n-1,k+1) for k >= 1.

n	a(n)
0	1
1	3
2	1
3	10
4	3
5	1
6	33
7	11
8	3
9	1
10	110
11	36
12	12
13	3
14	1
15	366
16	122
17	39
18	13
19	3
20	1
21	1220
22	405
23	135
24	42
25	14
26	3
27	1
28	4065
29	1355
30	447
31	149
32	45
33	15
34	3
35	1
36	13550
37	4512
38	1504
39	492
40	164
41	48
42	16
43	3
44	1
45	45162
46	15054
47	5004
48	1668
49	540
50	180
51	51
52	17
53	3
54	1

[1, 3, 1, 10, 3, 1, 33, 11, 3, 1, 110, 36, 12, 3, 1, 366, 122, 39, 13, 3, 1, 1220, 405, 135, 42, 14, 3, 1, 4065, 1355, 447, 149, 45, 15, 3, 1, 13550, 4512, 1504, 492, 164, 48, 16, 3, 1, 45162, 15054, 5004, 1668, 540, 180, 51, 17, 3, 1]

cp's OEIS Frontend

A126953 Triangle T(n,k), 0 <= k <= n, read by rows given by: T(0,0)=1, T(n,k)=0 if k < 0 or if k > n, T(n,0) = 3*T(n-1,0) + T(n-1,1), T(n,k) = T(n-1,k-1) + T(n-1,k+1) for k >= 1.

Table of values

List of values