A121400 - cp's OEIS frontend

A121400 Triangle, read by rows, where T(n,k) = T(n-1,k-1) + T(n-1,k) + T(n-1,k+1) for n>=k>=1, with T(0,0) = 1, T(n,n) = T(n,0) + T(n-1,n-1) for n>=1; T(n,k)=0 when n or k<0.

n	a(n)
0	1
1	1
2	2
3	3
4	3
5	5
6	6
7	11
8	8
9	11
10	17
11	25
12	30
13	19
14	28
15	42
16	72
17	74
18	77
19	47
20	70
21	114
22	188
23	223
24	198
25	194
26	117
27	184
28	302
29	525
30	609
31	615
32	509
33	495
34	301
35	486
36	827
37	1436
38	1749
39	1733
40	1619
41	1305
42	1282
43	787
44	1313
45	2263
46	4012
47	4918
48	5101
49	4657
50	4206
51	3374
52	3382
53	2100
54	3576

[1, 1, 2, 3, 3, 5, 6, 11, 8, 11, 17, 25, 30, 19, 28, 42, 72, 74, 77, 47, 70, 114, 188, 223, 198, 194, 117, 184, 302, 525, 609, 615, 509, 495, 301, 486, 827, 1436, 1749, 1733, 1619, 1305, 1282, 787, 1313, 2263, 4012, 4918, 5101, 4657, 4206, 3374, 3382, 2100, 3576]

cp's OEIS Frontend

A121400 Triangle, read by rows, where T(n,k) = T(n-1,k-1) + T(n-1,k) + T(n-1,k+1) for n>=k>=1, with T(0,0) = 1, T(n,n) = T(n,0) + T(n-1,n-1) for n>=1; T(n,k)=0 when n or k<0.

Table of values

List of values