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.

A234641 Odd numbers n such that sigma(sigma(n^2)) is odd.

Table of values

n a(n)
1 1
2 9
3 38423
4 104855
5 247863
6 313929
7 345807
8 376095
9 469623
10 623615
11 787127
12 943695
13 985369
14 1606281
15 1754039
16 1933815
17 2034423
18 2181409
19 3043401
20 5147241
21 5545617
22 5612535
23 6385703
24 7084143
25 8868321
26 10606679
27 11470511
28 11954409
29 12276745
30 12794655
31 13213921
32 14142695
33 15512065
34 15737953
35 15786351
36 16844135

List of values

[1, 9, 38423, 104855, 247863, 313929, 345807, 376095, 469623, 623615, 787127, 943695, 985369, 1606281, 1754039, 1933815, 2034423, 2181409, 3043401, 5147241, 5545617, 5612535, 6385703, 7084143, 8868321, 10606679, 11470511, 11954409, 12276745, 12794655, 13213921, 14142695, 15512065, 15737953, 15786351, 16844135]