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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.

A333120 a(1) = 1, a(n+1) = Sum_{d|n} a(d)^2.

Table of values

n a(n)
1 1
2 1
3 2
4 5
5 27
6 730
7 532906
8 283988804837
9 80649641272747674596596
10 6504364637422885153991868441922618991334787221
11 42306759336557340251452848811862268800945638555088445693345741249091605099189510505344903572

List of values

[1, 1, 2, 5, 27, 730, 532906, 283988804837, 80649641272747674596596, 6504364637422885153991868441922618991334787221, 42306759336557340251452848811862268800945638555088445693345741249091605099189510505344903572]

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

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