A026536 - cp's OEIS frontend

A026536 Irregular triangular array T read by rows: T(i,0 ) = T(i,2i) = 1 for i >= 0; T(i,1) = T(i,2i-1) = floor(i/2) for i >= 1; for even n >= 2, T(i,j) = T(i-1,j-2) + T(i-1,j-1) + T(i-1,j) for j = 2..2i-2, for odd n >= 3, T(i,j) = T(i-1,j-2) + T(i-1,j) for j = 2..2i-2.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	3
12	2
13	3
14	1
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	2
27	6
28	8
29	13
30	12
31	13
32	8
33	6
34	2
35	1
36	1
37	3
38	9
39	16
40	27
41	33
42	38
43	33
44	27
45	16
46	9
47	3
48	1
49	1
50	3
51	10
52	19
53	36
54	49
55	65
56	66
57	65
58	49
59	36
60	19
61	10
62	3
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180

[1, 1, 0, 1, 1, 1, 2, 1, 1, 1, 1, 3, 2, 3, 1, 1, 1, 2, 5, 6, 8, 6, 5, 2, 1, 1, 2, 6, 8, 13, 12, 13, 8, 6, 2, 1, 1, 3, 9, 16, 27, 33, 38, 33, 27, 16, 9, 3, 1, 1, 3, 10, 19, 36, 49, 65, 66, 65, 49, 36, 19, 10, 3, 1, 1, 4, 14, 32, 65, 104, 150, 180, 196, 180]

cp's OEIS Frontend

A026536 Irregular triangular array T read by rows: T(i,0 ) = T(i,2i) = 1 for i >= 0; T(i,1) = T(i,2i-1) = floor(i/2) for i >= 1; for even n >= 2, T(i,j) = T(i-1,j-2) + T(i-1,j-1) + T(i-1,j) for j = 2..2i-2, for odd n >= 3, T(i,j) = T(i-1,j-2) + T(i-1,j) for j = 2..2i-2.

Table of values

List of values

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	3
12	2
13	3
14	1
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	2
27	6
28	8
29	13
30	12
31	13
32	8
33	6
34	2
35	1
36	1
37	3
38	9
39	16
40	27
41	33
42	38
43	33
44	27
45	16
46	9
47	3
48	1
49	1
50	3
51	10
52	19
53	36
54	49
55	65
56	66
57	65
58	49
59	36
60	19
61	10
62	3
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	3
12	2
13	3
14	1
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	2
27	6
28	8
29	13
30	12
31	13
32	8
33	6
34	2
35	1
36	1
37	3
38	9
39	16
40	27
41	33
42	38
43	33
44	27
45	16
46	9
47	3
48	1
49	1
50	3
51	10
52	19
53	36
54	49
55	65
56	66
57	65
58	49
59	36
60	19
61	10
62	3
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	1
11	3
12	2
13	3
14	1
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	2
27	6
28	8
29	13
30	12
31	13
32	8
33	6
34	2
35	1
36	1
37	3
38	9
39	16
40	27
41	33
42	38
43	33
44	27
45	16
46	9
47	3
48	1
49	1
50	3
51	10
52	19
53	36
54	49
55	65
56	66
57	65
58	49
59	36
60	19
61	10
62	3
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180