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.

A325906 a(n) = ( (-1)^n * Sum_{k=0..n-2} (-1)^k*10^(2^k) + 10^(2^(n-1)) - ((-1)^n+3)/2 )/9.

Table of values

n a(n)
1 1
2 12
3 1121
4 11112212
5 1111111122221121
6 11111111111111112222222211112212
7 1111111111111111111111111111111122222222222222221111111122221121

List of values

[1, 12, 1121, 11112212, 1111111122221121, 11111111111111112222222211112212, 1111111111111111111111111111111122222222222222221111111122221121]

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

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