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.

A039656 Becomes prime after n iterations of f(x) = sigma(x)-1 (least inverse of A039655).

Table of values

n a(n)
0 2
1 6
2 4
3 27
4 12
5 9
6 121
7 301
8 930
9 484
10 578
11 441
12 1273
13 468
14 4863
15 3171
16 9216
17 8373
18 19692
19 19416
20 25442
21 13440
22 19230
23 16641
24 16804
25 83161
26 100652
27 226181
28 203400
29 133200
30 419248
31 380979
32 744796
33 553296
34 634710
35 539476
36 505584
37 674416
38 634206

List of values

[2, 6, 4, 27, 12, 9, 121, 301, 930, 484, 578, 441, 1273, 468, 4863, 3171, 9216, 8373, 19692, 19416, 25442, 13440, 19230, 16641, 16804, 83161, 100652, 226181, 203400, 133200, 419248, 380979, 744796, 553296, 634710, 539476, 505584, 674416, 634206]

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

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