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.

A159000 Numbers m such that m = s|t = phi(s)*sigma(t) for some numbers s and t, where "|" denotes concatenation.

Table of values

n a(n)
1 3360
2 19440
3 35712
4 55800
5 120960
6 395808
7 451584
8 548640
9 628992
10 695520
11 763344
12 3008768
13 3749760
14 5602320
15 17557344
16 46902240
17 55031040
18 119627904
19 162496048
20 193933440
21 243855360
22 249793920
23 374473800
24 377677440
25 548402400

List of values

[3360, 19440, 35712, 55800, 120960, 395808, 451584, 548640, 628992, 695520, 763344, 3008768, 3749760, 5602320, 17557344, 46902240, 55031040, 119627904, 162496048, 193933440, 243855360, 249793920, 374473800, 377677440, 548402400]

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

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