A181657 - cp's OEIS frontend

A181657 Generalized (conditional) Riordan array with k-th column generated by x^k * (1 + x - x^2 + x^3)/(1 - 2x^2 - x^4) if k mod 2 = 0, x^k * (1+x)/(1 - 2x^2 - x^4) otherwise.

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

[1, 1, 1, 1, 1, 1, 3, 2, 1, 1, 3, 2, 1, 1, 1, 7, 5, 3, 2, 1, 1, 7, 5, 3, 2, 1, 1, 1, 17, 12, 7, 5, 3, 2, 1, 1, 17, 12, 7, 5, 3, 2, 1, 1, 1, 41, 29, 17, 12, 7, 5, 3, 2, 1, 1, 41, 29, 17, 12, 7, 5, 3, 2, 1, 1, 1]

cp's OEIS Frontend

A181657 Generalized (conditional) Riordan array with k-th column generated by x^k * (1 + x - x^2 + x^3)/(1 - 2x^2 - x^4) if k mod 2 = 0, x^k * (1+x)/(1 - 2x^2 - x^4) otherwise.

Table of values

List of values

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

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

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