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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.

A356130 a(n) = Sum_{k=1..n} sigma_{n-1}(k).

Table of values

n a(n)
1 1
2 4
3 16
4 111
5 999
6 12513
7 185683
8 3316418
9 67810767
10 1576561677
11 40862702931
12 1171104916405
13 36722498575799
14 1251419967587955
15 46034784688102781
16 1818440444592581068
17 76763036794222996512
18 3448830049286378614987
19 164309958491233496689189

List of values

[1, 4, 16, 111, 999, 12513, 185683, 3316418, 67810767, 1576561677, 40862702931, 1171104916405, 36722498575799, 1251419967587955, 46034784688102781, 1818440444592581068, 76763036794222996512, 3448830049286378614987, 164309958491233496689189]

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

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