A026082 - cp's OEIS frontend

A026082 Irregular triangular array T read by rows: T(n,k) = C(n,k) for k=0..n for n = 0,1,2,3. For n >= 4, T(n,0) = T(n,2n)=1, T(n,1) = T(n,2n-1) = n - 3, T(4,2) = 4, T(4,3) = 3, T(4,4) = 6; T(4,5) = 3, T(4,6)=4; for n >= 5, T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k=2..2n-2.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	3
9	3
10	1
11	1
12	1
13	4
14	3
15	6
16	3
17	4
18	1
19	1
20	1
21	2
22	6
23	8
24	13
25	12
26	13
27	8
28	6
29	2
30	1
31	1
32	3
33	9
34	16
35	27
36	33
37	38
38	33
39	27
40	16
41	9
42	3
43	1
44	1
45	4
46	13
47	28
48	52
49	76
50	98
51	104
52	98
53	76
54	52
55	28
56	13
57	4
58	1
59	1
60	5
61	18
62	45
63	93
64	156
65	226
66	278
67	300
68	278
69	226
70	156
71	93
72	45
73	18
74	5
75	1
76	1
77	6
78	24
79	68
80	156
81	294
82	475
83	660
84	804

[1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 1, 4, 3, 6, 3, 4, 1, 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, 4, 13, 28, 52, 76, 98, 104, 98, 76, 52, 28, 13, 4, 1, 1, 5, 18, 45, 93, 156, 226, 278, 300, 278, 226, 156, 93, 45, 18, 5, 1, 1, 6, 24, 68, 156, 294, 475, 660, 804]

cp's OEIS Frontend

A026082 Irregular triangular array T read by rows: T(n,k) = C(n,k) for k=0..n for n = 0,1,2,3. For n >= 4, T(n,0) = T(n,2n)=1, T(n,1) = T(n,2n-1) = n - 3, T(4,2) = 4, T(4,3) = 3, T(4,4) = 6; T(4,5) = 3, T(4,6)=4; for n >= 5, T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k=2..2n-2.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	3
9	3
10	1
11	1
12	1
13	4
14	3
15	6
16	3
17	4
18	1
19	1
20	1
21	2
22	6
23	8
24	13
25	12
26	13
27	8
28	6
29	2
30	1
31	1
32	3
33	9
34	16
35	27
36	33
37	38
38	33
39	27
40	16
41	9
42	3
43	1
44	1
45	4
46	13
47	28
48	52
49	76
50	98
51	104
52	98
53	76
54	52
55	28
56	13
57	4
58	1
59	1
60	5
61	18
62	45
63	93
64	156
65	226
66	278
67	300
68	278
69	226
70	156
71	93
72	45
73	18
74	5
75	1
76	1
77	6
78	24
79	68
80	156
81	294
82	475
83	660
84	804

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	3
9	3
10	1
11	1
12	1
13	4
14	3
15	6
16	3
17	4
18	1
19	1
20	1
21	2
22	6
23	8
24	13
25	12
26	13
27	8
28	6
29	2
30	1
31	1
32	3
33	9
34	16
35	27
36	33
37	38
38	33
39	27
40	16
41	9
42	3
43	1
44	1
45	4
46	13
47	28
48	52
49	76
50	98
51	104
52	98
53	76
54	52
55	28
56	13
57	4
58	1
59	1
60	5
61	18
62	45
63	93
64	156
65	226
66	278
67	300
68	278
69	226
70	156
71	93
72	45
73	18
74	5
75	1
76	1
77	6
78	24
79	68
80	156
81	294
82	475
83	660
84	804

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	1
8	3
9	3
10	1
11	1
12	1
13	4
14	3
15	6
16	3
17	4
18	1
19	1
20	1
21	2
22	6
23	8
24	13
25	12
26	13
27	8
28	6
29	2
30	1
31	1
32	3
33	9
34	16
35	27
36	33
37	38
38	33
39	27
40	16
41	9
42	3
43	1
44	1
45	4
46	13
47	28
48	52
49	76
50	98
51	104
52	98
53	76
54	52
55	28
56	13
57	4
58	1
59	1
60	5
61	18
62	45
63	93
64	156
65	226
66	278
67	300
68	278
69	226
70	156
71	93
72	45
73	18
74	5
75	1
76	1
77	6
78	24
79	68
80	156
81	294
82	475
83	660
84	804