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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.

A351448 Odd numbers k for which A003958(sigma(k)) = 2*A003958(k), where A003958 is multiplicative with a(p^e) = (p-1)^e and sigma is the sum of divisors function.

Table of values

n a(n)
1 8181
2 400869
3 1507005
4 3918213
5 11151837
6 22002273
7 26669007
8 47319957
9 58170393
10 73843245
11 75825981
12 83488077
13 94338513
14 108277641
15 119656197
16 126889821
17 137740257
18 163057941
19 184758813
20 191992437
21 199226061
22 202842873
23 204768225
24 220926933
25 228160557
26 258457473
27 264328677
28 277602471
29 300496797

List of values

[8181, 400869, 1507005, 3918213, 11151837, 22002273, 26669007, 47319957, 58170393, 73843245, 75825981, 83488077, 94338513, 108277641, 119656197, 126889821, 137740257, 163057941, 184758813, 191992437, 199226061, 202842873, 204768225, 220926933, 228160557, 258457473, 264328677, 277602471, 300496797]

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

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