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.

A339875 Intersection of A137409 and A339870: Composite numbers k of the form 4u+1 having more than one prime factor of type 4u+3, and for which the odd part of phi(k) divides k-1.

Table of values

n a(n)
1 561
2 6601
3 8481
4 17733
5 23001
6 30889
7 54741
8 62745
9 88561
10 106141
11 319965
12 359601
13 449065
14 534061
15 609301
16 949785
17 1357621
18 2162721
19 2288661
20 2615977
21 3284281
22 4005001
23 4698001
24 4830805
25 5381265
26 6313681
27 6594721
28 6840001
29 8093701
30 11782005
31 11921001
32 14665105
33 14892153
34 15217741
35 16577785
36 19683001
37 20154061
38 20441701

List of values

[561, 6601, 8481, 17733, 23001, 30889, 54741, 62745, 88561, 106141, 319965, 359601, 449065, 534061, 609301, 949785, 1357621, 2162721, 2288661, 2615977, 3284281, 4005001, 4698001, 4830805, 5381265, 6313681, 6594721, 6840001, 8093701, 11782005, 11921001, 14665105, 14892153, 15217741, 16577785, 19683001, 20154061, 20441701]

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

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