A026519 - cp's OEIS frontend

A026519 Irregular triangular array T read by rows: T(n, k) = T(n-1, k-2) + T(n-1, k) if (n mod 2) = 0, otherwise T(n-1, k-2) + T(n-1, k-1) + T(n-1, k), with T(n, 0) = T(n, 2n) = 1, T(n, 1) = T(n, 2n-1) = floor((n+1)/2).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	4
12	4
13	4
14	2
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	3
27	8
28	13
29	19
30	20
31	19
32	13
33	8
34	3
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	4
51	13
52	28
53	52
54	76
55	98
56	104
57	98
58	76
59	52
60	28
61	13
62	4
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180
74	150
75	104
76	65
77	32
78	14
79	4
80	1

[1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 4, 4, 4, 2, 1, 1, 2, 5, 6, 8, 6, 5, 2, 1, 1, 3, 8, 13, 19, 20, 19, 13, 8, 3, 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, 4, 14, 32, 65, 104, 150, 180, 196, 180, 150, 104, 65, 32, 14, 4, 1]

cp's OEIS Frontend

A026519 Irregular triangular array T read by rows: T(n, k) = T(n-1, k-2) + T(n-1, k) if (n mod 2) = 0, otherwise T(n-1, k-2) + T(n-1, k-1) + T(n-1, k), with T(n, 0) = T(n, 2n) = 1, T(n, 1) = T(n, 2n-1) = floor((n+1)/2).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	4
12	4
13	4
14	2
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	3
27	8
28	13
29	19
30	20
31	19
32	13
33	8
34	3
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	4
51	13
52	28
53	52
54	76
55	98
56	104
57	98
58	76
59	52
60	28
61	13
62	4
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180
74	150
75	104
76	65
77	32
78	14
79	4
80	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	4
12	4
13	4
14	2
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	3
27	8
28	13
29	19
30	20
31	19
32	13
33	8
34	3
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	4
51	13
52	28
53	52
54	76
55	98
56	104
57	98
58	76
59	52
60	28
61	13
62	4
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180
74	150
75	104
76	65
77	32
78	14
79	4
80	1

cp's OEIS Frontend

A026519 Irregular triangular array T read by rows: T(n, k) = T(n-1, k-2) + T(n-1, k) if (n mod 2) = 0, otherwise T(n-1, k-2) + T(n-1, k-1) + T(n-1, k), with T(n, 0) = T(n, 2*n) = 1, T(n, 1) = T(n, 2*n-1) = floor((n+1)/2).

Table of values

List of values

A026519 Irregular triangular array T read by rows: T(n, k) = T(n-1, k-2) + T(n-1, k) if (n mod 2) = 0, otherwise T(n-1, k-2) + T(n-1, k-1) + T(n-1, k), with T(n, 0) = T(n, 2n) = 1, T(n, 1) = T(n, 2n-1) = floor((n+1)/2).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	4
12	4
13	4
14	2
15	1
16	1
17	2
18	5
19	6
20	8
21	6
22	5
23	2
24	1
25	1
26	3
27	8
28	13
29	19
30	20
31	19
32	13
33	8
34	3
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	4
51	13
52	28
53	52
54	76
55	98
56	104
57	98
58	76
59	52
60	28
61	13
62	4
63	1
64	1
65	4
66	14
67	32
68	65
69	104
70	150
71	180
72	196
73	180
74	150
75	104
76	65
77	32
78	14
79	4
80	1