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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.

A333121 a(1) = 1; a(n+1) = Product_{d|n} (1 + a(d)).

Table of values

n a(n)
1 1
2 2
3 6
4 14
5 90
6 182
7 7686
8 15374
9 1383750
10 19372514
11 10577393190
12 21154786382
13 2438935322096070
14 4877870644192142
15 224977149851430019446
16 286620888910721844775478
17 396611655030211352708069066250
18 793223310060422705416138132502
19 8436334593920261958919014477018674175558

List of values

[1, 2, 6, 14, 90, 182, 7686, 15374, 1383750, 19372514, 10577393190, 21154786382, 2438935322096070, 4877870644192142, 224977149851430019446, 286620888910721844775478, 396611655030211352708069066250, 793223310060422705416138132502, 8436334593920261958919014477018674175558]

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

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