A026323 - cp's OEIS frontend

A026323 Irregular triangular array T read by rows: T(0,0) = 1, T(0,1) = T(0,2) = 0; T(1,0) = T(1,1) = T(1,2) = 1, T(1,3) = 0; for n >= 2, T(n,0) = 1, T(n,1) = T(n-1,0) + T(n-1,1), T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k = 2,3,...,n+1 and T(n,n+2) = T(n-1,n) + T(n-1,n+1).

n	a(n)
1	1
2	0
3	0
4	1
5	1
6	1
7	0
8	1
9	2
10	3
11	2
12	1
13	1
14	3
15	6
16	7
17	6
18	3
19	1
20	4
21	10
22	16
23	19
24	16
25	9
26	1
27	5
28	15
29	30
30	45
31	51
32	44
33	25
34	1
35	6
36	21
37	50
38	90
39	126
40	140
41	120
42	69
43	1
44	7
45	28
46	77
47	161
48	266
49	356
50	386
51	329
52	189
53	1
54	8
55	36
56	112
57	266
58	504
59	783
60	1008
61	1071
62	904
63	518
64	1
65	9
66	45
67	156
68	414
69	882
70	1553
71	2295
72	2862
73	2983
74	2493

[1, 0, 0, 1, 1, 1, 0, 1, 2, 3, 2, 1, 1, 3, 6, 7, 6, 3, 1, 4, 10, 16, 19, 16, 9, 1, 5, 15, 30, 45, 51, 44, 25, 1, 6, 21, 50, 90, 126, 140, 120, 69, 1, 7, 28, 77, 161, 266, 356, 386, 329, 189, 1, 8, 36, 112, 266, 504, 783, 1008, 1071, 904, 518, 1, 9, 45, 156, 414, 882, 1553, 2295, 2862, 2983, 2493]

cp's OEIS Frontend

A026323 Irregular triangular array T read by rows: T(0,0) = 1, T(0,1) = T(0,2) = 0; T(1,0) = T(1,1) = T(1,2) = 1, T(1,3) = 0; for n >= 2, T(n,0) = 1, T(n,1) = T(n-1,0) + T(n-1,1), T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k = 2,3,...,n+1 and T(n,n+2) = T(n-1,n) + T(n-1,n+1).

Table of values

List of values