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.

A163763 Sqrt(sigma(A008847(n)^2)), where A008847 lists m such that sigma(m^2) is a square.

Table of values

n a(n)
1 1
2 11
3 31
4 341
5 1729
6 2821
7 19019
8 31031
9 43617
10 43491
11 68961
12 72219
13 82677
14 86583
15 117831
16 117831
17 187131
18 347529
19 347529
20 479787
21 503347
22 414309
23 436107
24 496713
25 478401
26 503347
27 758571
28 794409
29 909447
30 952413
31 658749
32 696787
33 696787

List of values

[1, 11, 31, 341, 1729, 2821, 19019, 31031, 43617, 43491, 68961, 72219, 82677, 86583, 117831, 117831, 187131, 347529, 347529, 479787, 503347, 414309, 436107, 496713, 478401, 503347, 758571, 794409, 909447, 952413, 658749, 696787, 696787]

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

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