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.

A300517 a(n) is the concatenation of n n times, n-1 n-1 times, ..., 22, 1.

Table of values

n a(n)
1 1
2 221
3 333221
4 4444333221
5 555554444333221
6 666666555554444333221
7 7777777666666555554444333221
8 888888887777777666666555554444333221
9 999999999888888887777777666666555554444333221
10 10101010101010101010999999999888888887777777666666555554444333221

List of values

[1, 221, 333221, 4444333221, 555554444333221, 666666555554444333221, 7777777666666555554444333221, 888888887777777666666555554444333221, 999999999888888887777777666666555554444333221, 10101010101010101010999999999888888887777777666666555554444333221]

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

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