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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.

A211395 Number of Sophie Germain primes between 2^n and 2^(n+1).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 2
6 3
7 7
8 8
9 13
10 23
11 41
12 67
13 111
14 193
15 360
16 630
17 1091
18 1938
19 3558
20 6448
21 11876
22 21649
23 40151
24 73658
25 135711
26 251786
27 468678
28 875247
29 1634069
30 3060794
31 5746245
32 10806204
33 20356921
34 38433398
35 72656139
36 137562095
37 260848098
38 495343258
39 941805467
40 1792999074

List of values

[1, 1, 1, 1, 2, 2, 3, 7, 8, 13, 23, 41, 67, 111, 193, 360, 630, 1091, 1938, 3558, 6448, 11876, 21649, 40151, 73658, 135711, 251786, 468678, 875247, 1634069, 3060794, 5746245, 10806204, 20356921, 38433398, 72656139, 137562095, 260848098, 495343258, 941805467, 1792999074]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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