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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.

A318372 a(1) = 1; a(n+1) = Sum_{d|n} d*a(d).

Table of values

n a(n)
1 1
2 1
3 3
4 10
5 43
6 216
7 1308
8 9157
9 73299
10 659701
11 6597228
12 72569509
13 870835456
14 11320860929
15 158492062165
16 2377380932700
17 38038094996499
18 646647614940484
19 11639657069589711
20 221153484322204510
21 4423069686450687468
22 92884463415464445994
23 2043458195140290381379
24 46999538488226678771718

List of values

[1, 1, 3, 10, 43, 216, 1308, 9157, 73299, 659701, 6597228, 72569509, 870835456, 11320860929, 158492062165, 2377380932700, 38038094996499, 646647614940484, 11639657069589711, 221153484322204510, 4423069686450687468, 92884463415464445994, 2043458195140290381379, 46999538488226678771718]

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

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