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.

A267712 Number of nontrivial prime powers p^k (k > 0) less than 10^n.

Table of values

n a(n)
1 7
2 35
3 193
4 1280
5 9700
6 78734
7 665134
8 5762859
9 50851223
10 455062595
11 4118082969
12 37607992088
13 346065767406
14 3204942420923
15 29844572385358
16 279238346816392
17 2623557174778438
18 24739954338671299
19 234057667428388198
20 2220819603016308079
21 21127269487386615271
22 201467286693435354626
23 1925320391619238700024
24 18435599767386814628355
25 176846309399257764978954
26 1699246750872783231673649

List of values

[7, 35, 193, 1280, 9700, 78734, 665134, 5762859, 50851223, 455062595, 4118082969, 37607992088, 346065767406, 3204942420923, 29844572385358, 279238346816392, 2623557174778438, 24739954338671299, 234057667428388198, 2220819603016308079, 21127269487386615271, 201467286693435354626, 1925320391619238700024, 18435599767386814628355, 176846309399257764978954, 1699246750872783231673649]

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

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