A143808 - cp's OEIS frontend

A143808 Triangle read by rows, first n terms of the sequence (1, 2, 4, 10, ...) followed by P(n), where (2, 4, 10, 12, ...) = twice Pell numbers.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	2
8	4
9	5
10	1
11	2
12	4
13	10
14	12
15	1
16	2
17	4
18	10
19	24
20	29
21	1
22	2
23	4
24	10
25	24
26	58
27	70
28	1
29	2
30	4
31	10
32	24
33	58
34	140
35	169
36	1
37	2
38	4
39	10
40	24
41	58
42	140
43	338
44	408
45	1
46	2
47	4
48	10
49	24
50	58
51	140
52	338
53	816
54	985

[1, 1, 1, 1, 2, 2, 1, 2, 4, 5, 1, 2, 4, 10, 12, 1, 2, 4, 10, 24, 29, 1, 2, 4, 10, 24, 58, 70, 1, 2, 4, 10, 24, 58, 140, 169, 1, 2, 4, 10, 24, 58, 140, 338, 408, 1, 2, 4, 10, 24, 58, 140, 338, 816, 985]

cp's OEIS Frontend

A143808 Triangle read by rows, first n terms of the sequence (1, 2, 4, 10, ...) followed by P(n), where (2, 4, 10, 12, ...) = twice Pell numbers.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	2
8	4
9	5
10	1
11	2
12	4
13	10
14	12
15	1
16	2
17	4
18	10
19	24
20	29
21	1
22	2
23	4
24	10
25	24
26	58
27	70
28	1
29	2
30	4
31	10
32	24
33	58
34	140
35	169
36	1
37	2
38	4
39	10
40	24
41	58
42	140
43	338
44	408
45	1
46	2
47	4
48	10
49	24
50	58
51	140
52	338
53	816
54	985

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	2
8	4
9	5
10	1
11	2
12	4
13	10
14	12
15	1
16	2
17	4
18	10
19	24
20	29
21	1
22	2
23	4
24	10
25	24
26	58
27	70
28	1
29	2
30	4
31	10
32	24
33	58
34	140
35	169
36	1
37	2
38	4
39	10
40	24
41	58
42	140
43	338
44	408
45	1
46	2
47	4
48	10
49	24
50	58
51	140
52	338
53	816
54	985

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	2
6	1
7	2
8	4
9	5
10	1
11	2
12	4
13	10
14	12
15	1
16	2
17	4
18	10
19	24
20	29
21	1
22	2
23	4
24	10
25	24
26	58
27	70
28	1
29	2
30	4
31	10
32	24
33	58
34	140
35	169
36	1
37	2
38	4
39	10
40	24
41	58
42	140
43	338
44	408
45	1
46	2
47	4
48	10
49	24
50	58
51	140
52	338
53	816
54	985