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.

A232729 Number of n-digit numbers that yield an n-digit number after Reverse and Add.

Table of values

n a(n)
1 4
2 45
3 405
4 4095
5 40500
6 405450
7 4050000
8 40504500
9 405000000
10 4050045000
11 40500000000
12 405000450000
13 4050000000000
14 40500004500000
15 405000000000000
16 4050000045000000
17 40500000000000000
18 405000000450000000
19 4050000000000000000
20 40500000004500000000
21 405000000000000000000

List of values

[4, 45, 405, 4095, 40500, 405450, 4050000, 40504500, 405000000, 4050045000, 40500000000, 405000450000, 4050000000000, 40500004500000, 405000000000000, 4050000045000000, 40500000000000000, 405000000450000000, 4050000000000000000, 40500000004500000000, 405000000000000000000]

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

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