A269026 - cp's OEIS frontend

A269026 a(1)=1; for n>1, define a sequence {b(m), m >= 1} by b(1)=a(n-1), b(2)=n, and b(m) = A020639(b(m-2)) + A006530(b(m-1)); then a(n) is the number of terms in that sequence before the first of the infinite string of 4s.

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

[1, 9, 12, 1, 4, 10, 5, 6, 8, 6, 5, 3, 15, 7, 12, 2, 17, 7, 4, 6, 13, 11, 8, 10, 9, 3, 12, 9, 11, 3, 12, 2, 16, 6, 12, 10, 5, 11, 12, 6, 9, 7, 12, 14, 13, 11, 16, 10, 5, 7, 12, 14, 8, 10, 5, 11, 4, 10, 17, 15, 15, 7, 8, 2, 5, 3, 15, 7, 4, 9, 12, 10, 5, 10, 13, 3, 11, 11, 11]

cp's OEIS Frontend

A269026 a(1)=1; for n>1, define a sequence {b(m), m >= 1} by b(1)=a(n-1), b(2)=n, and b(m) = A020639(b(m-2)) + A006530(b(m-1)); then a(n) is the number of terms in that sequence before the first of the infinite string of 4s.

Table of values

List of values

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

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

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