A377624 - cp's OEIS frontend

A377624 a(n) is the number of iterations of x -> 6*x + 5 until (# composites reached) = (# primes reached), starting with prime(n).

n	a(n)
1	17
2	5
3	1
4	3
5	9
6	11
7	15
8	1
9	1
10	3
11	7
12	5
13	5
14	7
15	1
16	1
17	5
18	1
19	1
20	7
21	5
22	5
23	9
24	1
25	5
26	1
27	1
28	9
29	3
30	13
31	1
32	1
33	5
34	9
35	1
36	11
37	5
38	7
39	1
40	1
41	1
42	13
43	5
44	7
45	9
46	1
47	1
48	1
49	3
50	1
51	1
52	9
53	3
54	3
55	1
56	3
57	7
58	1
59	9
60	1
61	1
62	1
63	5
64	5
65	1
66	13
67	1
68	3
69	9
70	3
71	1
72	1
73	3
74	17
75	1
76	1
77	5
78	1
79	3
80	9
81	1
82	5
83	5
84	1

[17, 5, 1, 3, 9, 11, 15, 1, 1, 3, 7, 5, 5, 7, 1, 1, 5, 1, 1, 7, 5, 5, 9, 1, 5, 1, 1, 9, 3, 13, 1, 1, 5, 9, 1, 11, 5, 7, 1, 1, 1, 13, 5, 7, 9, 1, 1, 1, 3, 1, 1, 9, 3, 3, 1, 3, 7, 1, 9, 1, 1, 1, 5, 5, 1, 13, 1, 3, 9, 3, 1, 1, 3, 17, 1, 1, 5, 1, 3, 9, 1, 5, 5, 1]

cp's OEIS Frontend

A377624 a(n) is the number of iterations of x -> 6*x + 5 until (# composites reached) = (# primes reached), starting with prime(n).

Table of values

List of values

n	a(n)
1	17
2	5
3	1
4	3
5	9
6	11
7	15
8	1
9	1
10	3
11	7
12	5
13	5
14	7
15	1
16	1
17	5
18	1
19	1
20	7
21	5
22	5
23	9
24	1
25	5
26	1
27	1
28	9
29	3
30	13
31	1
32	1
33	5
34	9
35	1
36	11
37	5
38	7
39	1
40	1
41	1
42	13
43	5
44	7
45	9
46	1
47	1
48	1
49	3
50	1
51	1
52	9
53	3
54	3
55	1
56	3
57	7
58	1
59	9
60	1
61	1
62	1
63	5
64	5
65	1
66	13
67	1
68	3
69	9
70	3
71	1
72	1
73	3
74	17
75	1
76	1
77	5
78	1
79	3
80	9
81	1
82	5
83	5
84	1

n	a(n)
1	17
2	5
3	1
4	3
5	9
6	11
7	15
8	1
9	1
10	3
11	7
12	5
13	5
14	7
15	1
16	1
17	5
18	1
19	1
20	7
21	5
22	5
23	9
24	1
25	5
26	1
27	1
28	9
29	3
30	13
31	1
32	1
33	5
34	9
35	1
36	11
37	5
38	7
39	1
40	1
41	1
42	13
43	5
44	7
45	9
46	1
47	1
48	1
49	3
50	1
51	1
52	9
53	3
54	3
55	1
56	3
57	7
58	1
59	9
60	1
61	1
62	1
63	5
64	5
65	1
66	13
67	1
68	3
69	9
70	3
71	1
72	1
73	3
74	17
75	1
76	1
77	5
78	1
79	3
80	9
81	1
82	5
83	5
84	1

n	a(n)
1	17
2	5
3	1
4	3
5	9
6	11
7	15
8	1
9	1
10	3
11	7
12	5
13	5
14	7
15	1
16	1
17	5
18	1
19	1
20	7
21	5
22	5
23	9
24	1
25	5
26	1
27	1
28	9
29	3
30	13
31	1
32	1
33	5
34	9
35	1
36	11
37	5
38	7
39	1
40	1
41	1
42	13
43	5
44	7
45	9
46	1
47	1
48	1
49	3
50	1
51	1
52	9
53	3
54	3
55	1
56	3
57	7
58	1
59	9
60	1
61	1
62	1
63	5
64	5
65	1
66	13
67	1
68	3
69	9
70	3
71	1
72	1
73	3
74	17
75	1
76	1
77	5
78	1
79	3
80	9
81	1
82	5
83	5
84	1