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.

A095007 Number of 4k+1 primes (A002144) in range ]2^n,2^(n+1)].

Table of values

n a(n)
1 0
2 1
3 1
4 2
5 4
6 6
7 10
8 21
9 38
10 66
11 127
12 233
13 432
14 805
15 1511
16 2837
17 5378
18 10186
19 19294
20 36827
21 70157
22 133975
23 256852
24 492882
25 946848
26 1823129
27 3513599
28 6780412
29 13103462
30 25348870
31 49090415
32 95167380
33 184662052
34 358630671
35 697097364
36 1356051342
37 2639870329
38 5142823877

List of values

[0, 1, 1, 2, 4, 6, 10, 21, 38, 66, 127, 233, 432, 805, 1511, 2837, 5378, 10186, 19294, 36827, 70157, 133975, 256852, 492882, 946848, 1823129, 3513599, 6780412, 13103462, 25348870, 49090415, 95167380, 184662052, 358630671, 697097364, 1356051342, 2639870329, 5142823877]

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

Content is available under The OEIS End-User License Agreement.