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.

A339870 Composite numbers k of the form 4u+1 for which the odd part of phi(k) divides k-1.

Table of values

n a(n)
1 85
2 561
3 1105
4 1261
5 1285
6 2465
7 4369
8 6601
9 8245
10 8481
11 9061
12 9605
13 10585
14 16405
15 16705
16 17733
17 18721
18 19669
19 21845
20 23001
21 28645
22 30889
23 38165
24 42121
25 43165
26 46657
27 54741
28 56797
29 57205
30 62745
31 65365
32 74593
33 78013
34 83665
35 88561
36 91001
37 106141
38 117181
39 124645
40 126701
41 134521
42 136981
43 141661
44 162401
45 171205
46 176437

List of values

[85, 561, 1105, 1261, 1285, 2465, 4369, 6601, 8245, 8481, 9061, 9605, 10585, 16405, 16705, 17733, 18721, 19669, 21845, 23001, 28645, 30889, 38165, 42121, 43165, 46657, 54741, 56797, 57205, 62745, 65365, 74593, 78013, 83665, 88561, 91001, 106141, 117181, 124645, 126701, 134521, 136981, 141661, 162401, 171205, 176437]