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.

A336464 Numbers k for which A335915(k), A335915(sigma(k)) and A335915(sigma(sigma(k))) obtain the same value.

Table of values

n a(n)
1 1
2 2
3 28
4 56
5 60
6 84
7 160
8 168
9 528
10 12936
11 32760
12 102960
13 1097280
14 1778400
15 11740302
16 19183500
17 25241600
18 235855620
19 308308000
20 317167200
21 424305000
22 459818240
23 704700000
24 787200000
25 924924000
26 1592025435
27 2701416960
28 3812244480

List of values

[1, 2, 28, 56, 60, 84, 160, 168, 528, 12936, 32760, 102960, 1097280, 1778400, 11740302, 19183500, 25241600, 235855620, 308308000, 317167200, 424305000, 459818240, 704700000, 787200000, 924924000, 1592025435, 2701416960, 3812244480]

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

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