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.

A011254 Numbers k such that phi(k) + sigma(k) = 4*k.

Table of values

n a(n)
1 23760
2 59400
3 153720
4 4563000
5 45326160
6 113315400
7 402831360
8 731601000
9 803685120
10 865950624
11 919501200
12 1178491680
13 3504597120
14 3786686400
15 6429564000
16 14924714400
17 25310621952
18 26998616736
19 53138687040
20 86955675840
21 513969369984
22 1054373308800
23 1868445408960

List of values

[23760, 59400, 153720, 4563000, 45326160, 113315400, 402831360, 731601000, 803685120, 865950624, 919501200, 1178491680, 3504597120, 3786686400, 6429564000, 14924714400, 25310621952, 26998616736, 53138687040, 86955675840, 513969369984, 1054373308800, 1868445408960]

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

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