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.

A066110 Primes of the form sigma_4(k)/sigma_2(k), arising in A066109.

Table of values

n a(n)
1 13
2 73
3 313
4 601
5 28393
6 83233
7 922561
8 3416953
9 13842121
10 47451433
11 141146281
12 212601841
13 234750601
14 294482761
15 2750006041
16 3262751521
17 4362404353
18 4784281393
19 5236041961
20 9354855121
21 9597826993
22 13564461457
23 16936647121

List of values

[13, 73, 313, 601, 28393, 83233, 922561, 3416953, 13842121, 47451433, 141146281, 212601841, 234750601, 294482761, 2750006041, 3262751521, 4362404353, 4784281393, 5236041961, 9354855121, 9597826993, 13564461457, 16936647121]

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

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