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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.

A280286 a(n) is the least k such that sopfr(k) - sopf(k) = n.

Table of values

n a(n)
2 4
3 9
4 8
5 25
6 16
7 49
8 32
9 81
10 64
11 121
12 128
13 169
14 256
15 625
16 512
17 289
18 1024
19 361
20 2048
21 1444
22 1331
23 529
24 5324
25 2116
26 2197
27 4232
28 8788
29 841
30 17576
31 961
32 7569
33 3844
34 4913
35 7688
36 19652
37 1369
38 6859
39 5476
40 12321
41 1681
42 34225
43 1849
44 15129
45 7396
46 12167
47 2209
48 46225
49 8836
50 19881

List of values

[4, 9, 8, 25, 16, 49, 32, 81, 64, 121, 128, 169, 256, 625, 512, 289, 1024, 361, 2048, 1444, 1331, 529, 5324, 2116, 2197, 4232, 8788, 841, 17576, 961, 7569, 3844, 4913, 7688, 19652, 1369, 6859, 5476, 12321, 1681, 34225, 1849, 15129, 7396, 12167, 2209, 46225, 8836, 19881]

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

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