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.

A137818 Non-biquadratefree "year numbers": phi(n) = 2 phi(sigma(n)) and p^4 | n for some p>1.

Table of values

n a(n)
1 295569
2 1811079
3 1964375
4 2069469
5 4473387
6 5854375
7 10936053
8 13260625
9 18029709
10 21576537
11 22182093
12 25536875
13 35595625
14 46404333
15 49648383
16 55094375
17 57044817
18 58650625
19 67009923
20 69166467
21 72681875
22 76106875

List of values

[295569, 1811079, 1964375, 2069469, 4473387, 5854375, 10936053, 13260625, 18029709, 21576537, 22182093, 25536875, 35595625, 46404333, 49648383, 55094375, 57044817, 58650625, 67009923, 69166467, 72681875, 76106875]