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.

A272818 Numbers such that (sum + product) of all their prime factors equals (sum + product) of all exponents in their prime factorization.

Table of values

n a(n)
1 1
2 4
3 27
4 72
5 96
6 108
7 486
8 800
9 1280
10 3125
11 6272
12 10976
13 12500
14 14336
15 21600
16 30375
17 36000
18 48600
19 51840
20 54675
21 69120
22 84375
23 121500
24 134456
25 169344
26 174960
27 192000
28 225000
29 240000
30 247808
31 337500
32 340736
33 395136
34 435456
35 451584
36 703125
37 750141
38 781250
39 787320
40 823543
41 857304
42 885735

List of values

[1, 4, 27, 72, 96, 108, 486, 800, 1280, 3125, 6272, 10976, 12500, 14336, 21600, 30375, 36000, 48600, 51840, 54675, 69120, 84375, 121500, 134456, 169344, 174960, 192000, 225000, 240000, 247808, 337500, 340736, 395136, 435456, 451584, 703125, 750141, 781250, 787320, 823543, 857304, 885735]