A026736 - cp's OEIS frontend

A026736 Triangular array T read by rows: T(n,0) = T(n,n) = 1 for n >= 0; for n >= 2 and 1 <= k <= n-1, T(n,k) = T(n-1,k-1) + T(n-2,k-1) + T(n-1,k) if n is even and k=(n-2)/2, otherwise T(n,k) = T(n-1,k-1) + T(n-1,k).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	5
12	6
13	4
14	1
15	1
16	6
17	11
18	10
19	5
20	1
21	1
22	7
23	22
24	21
25	15
26	6
27	1
28	1
29	8
30	29
31	43
32	36
33	21
34	7
35	1
36	1
37	9
38	37
39	94
40	79
41	57
42	28
43	8
44	1
45	1
46	10
47	46
48	131
49	173
50	136
51	85
52	36
53	9
54	1
55	1
56	11
57	56
58	177
59	398
60	309
61	221
62	121
63	45
64	10
65	1
66	1
67	12
68	67
69	233
70	575
71	707
72	530
73	342
74	166
75	55
76	11
77	1

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 5, 6, 4, 1, 1, 6, 11, 10, 5, 1, 1, 7, 22, 21, 15, 6, 1, 1, 8, 29, 43, 36, 21, 7, 1, 1, 9, 37, 94, 79, 57, 28, 8, 1, 1, 10, 46, 131, 173, 136, 85, 36, 9, 1, 1, 11, 56, 177, 398, 309, 221, 121, 45, 10, 1, 1, 12, 67, 233, 575, 707, 530, 342, 166, 55, 11, 1]

cp's OEIS Frontend

A026736 Triangular array T read by rows: T(n,0) = T(n,n) = 1 for n >= 0; for n >= 2 and 1 <= k <= n-1, T(n,k) = T(n-1,k-1) + T(n-2,k-1) + T(n-1,k) if n is even and k=(n-2)/2, otherwise T(n,k) = T(n-1,k-1) + T(n-1,k).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	5
12	6
13	4
14	1
15	1
16	6
17	11
18	10
19	5
20	1
21	1
22	7
23	22
24	21
25	15
26	6
27	1
28	1
29	8
30	29
31	43
32	36
33	21
34	7
35	1
36	1
37	9
38	37
39	94
40	79
41	57
42	28
43	8
44	1
45	1
46	10
47	46
48	131
49	173
50	136
51	85
52	36
53	9
54	1
55	1
56	11
57	56
58	177
59	398
60	309
61	221
62	121
63	45
64	10
65	1
66	1
67	12
68	67
69	233
70	575
71	707
72	530
73	342
74	166
75	55
76	11
77	1

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	5
12	6
13	4
14	1
15	1
16	6
17	11
18	10
19	5
20	1
21	1
22	7
23	22
24	21
25	15
26	6
27	1
28	1
29	8
30	29
31	43
32	36
33	21
34	7
35	1
36	1
37	9
38	37
39	94
40	79
41	57
42	28
43	8
44	1
45	1
46	10
47	46
48	131
49	173
50	136
51	85
52	36
53	9
54	1
55	1
56	11
57	56
58	177
59	398
60	309
61	221
62	121
63	45
64	10
65	1
66	1
67	12
68	67
69	233
70	575
71	707
72	530
73	342
74	166
75	55
76	11
77	1

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	3
9	1
10	1
11	5
12	6
13	4
14	1
15	1
16	6
17	11
18	10
19	5
20	1
21	1
22	7
23	22
24	21
25	15
26	6
27	1
28	1
29	8
30	29
31	43
32	36
33	21
34	7
35	1
36	1
37	9
38	37
39	94
40	79
41	57
42	28
43	8
44	1
45	1
46	10
47	46
48	131
49	173
50	136
51	85
52	36
53	9
54	1
55	1
56	11
57	56
58	177
59	398
60	309
61	221
62	121
63	45
64	10
65	1
66	1
67	12
68	67
69	233
70	575
71	707
72	530
73	342
74	166
75	55
76	11
77	1