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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.

A360504 Concatenate the ternary strings for 1,2,...,n-1, n, n-1, ..., 2,1.

Table of values

n a(n)
1 1
2 121
3 121021
4 1210111021
5 12101112111021
6 121011122012111021
7 1210111220212012111021
8 12101112202122212012111021
9 1210111220212210022212012111021
10 1210111220212210010110022212012111021
11 1210111220212210010110210110022212012111021
12 1210111220212210010110211010210110022212012111021

List of values

[1, 121, 121021, 1210111021, 12101112111021, 121011122012111021, 1210111220212012111021, 12101112202122212012111021, 1210111220212210022212012111021, 1210111220212210010110022212012111021, 1210111220212210010110210110022212012111021, 1210111220212210010110211010210110022212012111021]

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

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