A124816 - cp's OEIS frontend

A124816 Product of Riordan array (1,x(1-x^2))^(-1) and number triangle T(n,k)=C(floor(k/2),n-k).

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	0
11	0
12	2
13	1
14	1
15	0
16	3
17	3
18	3
19	2
20	1
21	0
22	0
23	7
24	4
25	5
26	2
27	1
28	0
29	12
30	12
31	12
32	10
33	6
34	3
35	1
36	0
37	0
38	30
39	18
40	24
41	12
42	9
43	3
44	1
45	0
46	55
47	55
48	55
49	50
50	32
51	22
52	10
53	4
54	1
55	0
56	0
57	143
58	88
59	121
60	66
61	57
62	25
63	14
64	4
65	1
66	0
67	273
68	273
69	273

[1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 2, 1, 1, 0, 3, 3, 3, 2, 1, 0, 0, 7, 4, 5, 2, 1, 0, 12, 12, 12, 10, 6, 3, 1, 0, 0, 30, 18, 24, 12, 9, 3, 1, 0, 55, 55, 55, 50, 32, 22, 10, 4, 1, 0, 0, 143, 88, 121, 66, 57, 25, 14, 4, 1, 0, 273, 273, 273]

cp's OEIS Frontend

A124816 Product of Riordan array (1,x(1-x^2))^(-1) and number triangle T(n,k)=C(floor(k/2),n-k).

Table of values

List of values

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	0
11	0
12	2
13	1
14	1
15	0
16	3
17	3
18	3
19	2
20	1
21	0
22	0
23	7
24	4
25	5
26	2
27	1
28	0
29	12
30	12
31	12
32	10
33	6
34	3
35	1
36	0
37	0
38	30
39	18
40	24
41	12
42	9
43	3
44	1
45	0
46	55
47	55
48	55
49	50
50	32
51	22
52	10
53	4
54	1
55	0
56	0
57	143
58	88
59	121
60	66
61	57
62	25
63	14
64	4
65	1
66	0
67	273
68	273
69	273

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	0
11	0
12	2
13	1
14	1
15	0
16	3
17	3
18	3
19	2
20	1
21	0
22	0
23	7
24	4
25	5
26	2
27	1
28	0
29	12
30	12
31	12
32	10
33	6
34	3
35	1
36	0
37	0
38	30
39	18
40	24
41	12
42	9
43	3
44	1
45	0
46	55
47	55
48	55
49	50
50	32
51	22
52	10
53	4
54	1
55	0
56	0
57	143
58	88
59	121
60	66
61	57
62	25
63	14
64	4
65	1
66	0
67	273
68	273
69	273

n	a(n)
0	1
1	0
2	1
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	0
11	0
12	2
13	1
14	1
15	0
16	3
17	3
18	3
19	2
20	1
21	0
22	0
23	7
24	4
25	5
26	2
27	1
28	0
29	12
30	12
31	12
32	10
33	6
34	3
35	1
36	0
37	0
38	30
39	18
40	24
41	12
42	9
43	3
44	1
45	0
46	55
47	55
48	55
49	50
50	32
51	22
52	10
53	4
54	1
55	0
56	0
57	143
58	88
59	121
60	66
61	57
62	25
63	14
64	4
65	1
66	0
67	273
68	273
69	273