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.

A007942 Decimal concatenation of sequence (n, n-1, ..., 2, 1, 2, ..., n-1, n).

Table of values

n a(n)
1 1
2 212
3 32123
4 4321234
5 543212345
6 65432123456
7 7654321234567
8 876543212345678
9 98765432123456789
10 109876543212345678910
11 1110987654321234567891011
12 12111098765432123456789101112
13 131211109876543212345678910111213
14 1413121110987654321234567891011121314

List of values

[1, 212, 32123, 4321234, 543212345, 65432123456, 7654321234567, 876543212345678, 98765432123456789, 109876543212345678910, 1110987654321234567891011, 12111098765432123456789101112, 131211109876543212345678910111213, 1413121110987654321234567891011121314]

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

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