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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A377615 a(n) is the number of iterations of x -> 2*x + 7 until (# composites reached) = (# primes reached), starting with prime(n).

Table of values

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

List of values

[23, 7, 9, 1, 21, 1, 7, 1, 21, 1, 1, 1, 3, 1, 3, 19, 1, 1, 1, 5, 1, 1, 7, 1, 1, 1, 1, 1, 1, 17, 1, 9, 17, 1, 1, 1, 1, 1, 1, 5, 1, 1, 3, 1, 15, 1, 1, 1, 9, 1, 1, 1, 1, 3, 17, 1, 1, 1, 1, 15, 1, 11, 1, 1, 1, 5, 1, 1, 11, 1, 1, 1, 1, 1, 1, 23, 1, 1, 11, 1, 1, 1]