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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.

A095023 Number of 5k+3 primes (A030431) in range ]2^n,2^(n+1)].

Table of values

n a(n)
1 1
2 0
3 1
4 1
5 2
6 4
7 5
8 11
9 18
10 36
11 63
12 117
13 220
14 407
15 760
16 1435
17 2682
18 5074
19 9683
20 18392
21 35113
22 67054
23 128503
24 246433
25 473717
26 911310
27 1756933
28 3390711
29 6551833
30 12673497
31 24546404
32 47584981
33 92331321
34 179315178
35 348550417
36 678028865
37 1319937828
38 2571418193

List of values

[1, 0, 1, 1, 2, 4, 5, 11, 18, 36, 63, 117, 220, 407, 760, 1435, 2682, 5074, 9683, 18392, 35113, 67054, 128503, 246433, 473717, 911310, 1756933, 3390711, 6551833, 12673497, 24546404, 47584981, 92331321, 179315178, 348550417, 678028865, 1319937828, 2571418193]

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

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