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.

A138957 Concatenation of the reversed digits of numbers from 1 to n.

Table of values

n a(n)
1 1
2 12
3 123
4 1234
5 12345
6 123456
7 1234567
8 12345678
9 123456789
10 12345678901
11 1234567890111
12 123456789011121
13 12345678901112131
14 1234567890111213141
15 123456789011121314151
16 12345678901112131415161

List of values

[1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 12345678901, 1234567890111, 123456789011121, 12345678901112131, 1234567890111213141, 123456789011121314151, 12345678901112131415161]

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

Content is available under The OEIS End-User License Agreement.