cp's OEIS Frontend

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.

A379144 a(n) is the number of iterations of the function x --> 2*x - 1 such that x remains prime, starting from A005382(n).

Table of values

n a(n)
1 2
2 1
3 1
4 2
5 1
6 1
7 2
8 1
9 1
10 1
11 1
12 1
13 1
14 1
15 1
16 2
17 1
18 1
19 1
20 2
21 2
22 1
23 1
24 1
25 1
26 2
27 1
28 1
29 1
30 1
31 2
32 1
33 1
34 1
35 1
36 1
37 2
38 1
39 1
40 2
41 1
42 1
43 1
44 1
45 4
46 1
47 1
48 1
49 1
50 1
51 1
52 1
53 2
54 3
55 1
56 2
57 1
58 1
59 3
60 1
61 1
62 1
63 1
64 1
65 1
66 1
67 2
68 1
69 2
70 1
71 3
72 1
73 2
74 1
75 2
76 1
77 1
78 1
79 1
80 1
81 1
82 1
83 1
84 1
85 1
86 2
87 1
88 1
89 1
90 1
91 1
92 2
93 1
94 2
95 2
96 1
97 1
98 1
99 1

List of values

[2, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 4, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 2, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 1, 1]