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.

A227891 Numbers for which the number of odious proper divisors (A000069) equals the number of evil proper divisors (A001969).

Table of values

n a(n)
1 1
2 9
3 25
4 289
5 441
6 529
7 625
8 841
9 1849
10 2809
11 3249
12 5041
13 6889
14 7225
15 7569
16 7921
17 10201
18 12769
19 15129
20 15625
21 19321
22 21025
23 22201
24 26569
25 31329
26 38809
27 46225
28 48841
29 53361
30 55225
31 66049
32 69169
33 72361
34 76729
35 78961
36 83521
37 85849
38 93025
39 96721
40 100489
41 103041

List of values

[1, 9, 25, 289, 441, 529, 625, 841, 1849, 2809, 3249, 5041, 6889, 7225, 7569, 7921, 10201, 12769, 15129, 15625, 19321, 21025, 22201, 26569, 31329, 38809, 46225, 48841, 53361, 55225, 66049, 69169, 72361, 76729, 78961, 83521, 85849, 93025, 96721, 100489, 103041]