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.

A279926 a(n) = Sum_{k=1..n-1} sigma_3(k)*sigma_9(n-k).

Table of values

n a(n)
1 0
2 1
3 522
4 24329
5 454250
6 4905766
7 36532244
8 207705929
9 961214238
10 3784166376
11 13066960126
12 40511160326
13 114681233758
14 300599979884
15 737035375772
16 1705830324553
17 3751239987240
18 7887626314003
19 15927815870322
20 31031953887704
21 58508991327728
22 107133058597170

List of values

[0, 1, 522, 24329, 454250, 4905766, 36532244, 207705929, 961214238, 3784166376, 13066960126, 40511160326, 114681233758, 300599979884, 737035375772, 1705830324553, 3751239987240, 7887626314003, 15927815870322, 31031953887704, 58508991327728, 107133058597170]

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

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