A026637 - cp's OEIS frontend

A026637 Triangular array T read by rows: T(n,0) = T(n,n) = 1 for n >= 0, T(n,1) = T(n,n-1) = floor((3*n-1)/2) for n >= 1, otherwise T(n,k) = T(n-1,k-1) + T(n-1,k) for 2 <= k <= n-2, n >= 4.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	4
8	4
9	1
10	1
11	5
12	8
13	5
14	1
15	1
16	7
17	13
18	13
19	7
20	1
21	1
22	8
23	20
24	26
25	20
26	8
27	1
28	1
29	10
30	28
31	46
32	46
33	28
34	10
35	1
36	1
37	11
38	38
39	74
40	92
41	74
42	38
43	11
44	1
45	1
46	13
47	49
48	112
49	166
50	166
51	112
52	49
53	13
54	1
55	1
56	14
57	62
58	161
59	278
60	332
61	278
62	161
63	62
64	14
65	1
66	1
67	16
68	76
69	223
70	439
71	610
72	610
73	439
74	223
75	76
76	16
77	1

[1, 1, 1, 1, 2, 1, 1, 4, 4, 1, 1, 5, 8, 5, 1, 1, 7, 13, 13, 7, 1, 1, 8, 20, 26, 20, 8, 1, 1, 10, 28, 46, 46, 28, 10, 1, 1, 11, 38, 74, 92, 74, 38, 11, 1, 1, 13, 49, 112, 166, 166, 112, 49, 13, 1, 1, 14, 62, 161, 278, 332, 278, 161, 62, 14, 1, 1, 16, 76, 223, 439, 610, 610, 439, 223, 76, 16, 1]

cp's OEIS Frontend

A026637 Triangular array T read by rows: T(n,0) = T(n,n) = 1 for n >= 0, T(n,1) = T(n,n-1) = floor((3*n-1)/2) for n >= 1, otherwise T(n,k) = T(n-1,k-1) + T(n-1,k) for 2 <= k <= n-2, n >= 4.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	4
8	4
9	1
10	1
11	5
12	8
13	5
14	1
15	1
16	7
17	13
18	13
19	7
20	1
21	1
22	8
23	20
24	26
25	20
26	8
27	1
28	1
29	10
30	28
31	46
32	46
33	28
34	10
35	1
36	1
37	11
38	38
39	74
40	92
41	74
42	38
43	11
44	1
45	1
46	13
47	49
48	112
49	166
50	166
51	112
52	49
53	13
54	1
55	1
56	14
57	62
58	161
59	278
60	332
61	278
62	161
63	62
64	14
65	1
66	1
67	16
68	76
69	223
70	439
71	610
72	610
73	439
74	223
75	76
76	16
77	1

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	4
8	4
9	1
10	1
11	5
12	8
13	5
14	1
15	1
16	7
17	13
18	13
19	7
20	1
21	1
22	8
23	20
24	26
25	20
26	8
27	1
28	1
29	10
30	28
31	46
32	46
33	28
34	10
35	1
36	1
37	11
38	38
39	74
40	92
41	74
42	38
43	11
44	1
45	1
46	13
47	49
48	112
49	166
50	166
51	112
52	49
53	13
54	1
55	1
56	14
57	62
58	161
59	278
60	332
61	278
62	161
63	62
64	14
65	1
66	1
67	16
68	76
69	223
70	439
71	610
72	610
73	439
74	223
75	76
76	16
77	1

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	4
8	4
9	1
10	1
11	5
12	8
13	5
14	1
15	1
16	7
17	13
18	13
19	7
20	1
21	1
22	8
23	20
24	26
25	20
26	8
27	1
28	1
29	10
30	28
31	46
32	46
33	28
34	10
35	1
36	1
37	11
38	38
39	74
40	92
41	74
42	38
43	11
44	1
45	1
46	13
47	49
48	112
49	166
50	166
51	112
52	49
53	13
54	1
55	1
56	14
57	62
58	161
59	278
60	332
61	278
62	161
63	62
64	14
65	1
66	1
67	16
68	76
69	223
70	439
71	610
72	610
73	439
74	223
75	76
76	16
77	1