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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.

A223900 Li estimate of the number of primes in successive power of two intervals [2^i, 2^(i+1)) for i >= 1.

Table of values

n a(n)
1 2
2 3
3 4
4 6
5 9
6 15
7 25
8 44
9 78
10 141
11 256
12 471
13 873
14 1625
15 3040
16 5713
17 10774
18 20385
19 38684
20 73603
21 140374
22 268298
23 513811
24 985763
25 1894365
26 3646034
27 7027395
28 13562528
29 26207171
30 50698756
31 98183852
32 190335311
33 369325054
34 717272497
35 1394195117
36 2712106284
37 5279770660
38 10285644688

List of values

[2, 3, 4, 6, 9, 15, 25, 44, 78, 141, 256, 471, 873, 1625, 3040, 5713, 10774, 20385, 38684, 73603, 140374, 268298, 513811, 985763, 1894365, 3646034, 7027395, 13562528, 26207171, 50698756, 98183852, 190335311, 369325054, 717272497, 1394195117, 2712106284, 5279770660, 10285644688]

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

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