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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.

A137819 Year numbers, i.e., phi(n) = 2 phi(sigma(n)), divisible by a 5th prime power.

Table of values

n a(n)
1 1811079
2 4473387
3 67009923
4 77242167
5 88605819
6 110475819
7 120781449
8 132208767
9 134082297
10 165515319
11 183408867
12 225548469
13 232275681
14 272876607
15 284339403
16 326557251
17 349538247
18 402371793
19 425844621
20 501668883
21 566867727

List of values

[1811079, 4473387, 67009923, 77242167, 88605819, 110475819, 120781449, 132208767, 134082297, 165515319, 183408867, 225548469, 232275681, 272876607, 284339403, 326557251, 349538247, 402371793, 425844621, 501668883, 566867727]

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

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