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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.

A181869 a(1) = 2, a(2) = 1. For n >= 3, a(n) is found by concatenating the squares of the first n-1 terms of the sequence in reverse order and then dividing the resulting number by a(n-1).

Table of values

n a(n)
1 2
2 1
3 14
4 1401
5 140100014
6 140100014000000001401
7 14010001400000000140100000000000000000000140100014

List of values

[2, 1, 14, 1401, 140100014, 140100014000000001401, 14010001400000000140100000000000000000000140100014]

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

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