A126954 - cp's OEIS frontend

A126954 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) + T(n-1,k+1) for k >= 1.

n	a(n)
0	1
1	3
2	1
3	10
4	4
5	1
6	34
7	15
8	5
9	1
10	117
11	54
12	21
13	6
14	1
15	405
16	192
17	81
18	28
19	7
20	1
21	1407
22	678
23	301
24	116
25	36
26	8
27	1
28	4899
29	2386
30	1095
31	453
32	160
33	45
34	9
35	1
36	17083
37	8380
38	3934
39	1708
40	658
41	214
42	55
43	10
44	1
45	59629
46	29397
47	14022
48	6300
49	2580
50	927
51	279
52	66
53	11
54	1

[1, 3, 1, 10, 4, 1, 34, 15, 5, 1, 117, 54, 21, 6, 1, 405, 192, 81, 28, 7, 1, 1407, 678, 301, 116, 36, 8, 1, 4899, 2386, 1095, 453, 160, 45, 9, 1, 17083, 8380, 3934, 1708, 658, 214, 55, 10, 1, 59629, 29397, 14022, 6300, 2580, 927, 279, 66, 11, 1]

cp's OEIS Frontend

A126954 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) + T(n-1,k+1) for k >= 1.

Table of values

List of values