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.

A049227 Sigma(n) / d(n) is a perfect square associated with A049226.

Table of values

n a(n)
1 36
2 144
3 196
4 400
5 900
6 1764
7 3136
8 2304
9 3844
10 4900
11 12100
12 7056
13 13689
14 9216
15 6400
16 15876
17 25600
18 44100
19 93636
20 57600
21 32400
22 69696
23 81796
24 94864
25 57600
26 213444
27 72900
28 152100
29 152100
30 360000
31 230400
32 260100
33 298116
34 435600
35 298116
36 254016
37 291600
38 656100

List of values

[36, 144, 196, 400, 900, 1764, 3136, 2304, 3844, 4900, 12100, 7056, 13689, 9216, 6400, 15876, 25600, 44100, 93636, 57600, 32400, 69696, 81796, 94864, 57600, 213444, 72900, 152100, 152100, 360000, 230400, 260100, 298116, 435600, 298116, 254016, 291600, 656100]

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

Content is available under The OEIS End-User License Agreement.