A026268 - cp's OEIS frontend

A026268 Triangle, T(n, k): T(n,k) = 1 for n < 3, T(3,1) = T(3,2) = T(3,3) = 2, T(n,0) = 1, T(n,1) = n-1, T(n,n) = T(n-1,n-2) + T(n-1,n-1), otherwise T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k), read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	2
8	2
9	2
10	1
11	3
12	5
13	6
14	4
15	1
16	4
17	9
18	14
19	15
20	10
21	1
22	5
23	14
24	27
25	38
26	39
27	25
28	1
29	6
30	20
31	46
32	79
33	104
34	102
35	64
36	1
37	7
38	27
39	72
40	145
41	229
42	285
43	270
44	166
45	1
46	8
47	35
48	106
49	244
50	446
51	659
52	784
53	721
54	436
55	1
56	9
57	44
58	149
59	385
60	796
61	1349
62	1889
63	2164
64	1941
65	1157
66	1
67	10
68	54
69	202
70	578
71	1330
72	2530
73	4034
74	5402
75	5994
76	5262
77	3098

[1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 3, 5, 6, 4, 1, 4, 9, 14, 15, 10, 1, 5, 14, 27, 38, 39, 25, 1, 6, 20, 46, 79, 104, 102, 64, 1, 7, 27, 72, 145, 229, 285, 270, 166, 1, 8, 35, 106, 244, 446, 659, 784, 721, 436, 1, 9, 44, 149, 385, 796, 1349, 1889, 2164, 1941, 1157, 1, 10, 54, 202, 578, 1330, 2530, 4034, 5402, 5994, 5262, 3098]

cp's OEIS Frontend

A026268 Triangle, T(n, k): T(n,k) = 1 for n < 3, T(3,1) = T(3,2) = T(3,3) = 2, T(n,0) = 1, T(n,1) = n-1, T(n,n) = T(n-1,n-2) + T(n-1,n-1), otherwise T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k), read by rows.

Table of values

List of values