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.

A359271 Number of odd digits necessary to write all nonnegative n-digit integers.

Table of values

n a(n)
1 5
2 95
3 1400
4 18500
5 230000
6 2750000
7 32000000
8 365000000
9 4100000000
10 45500000000
11 500000000000
12 5450000000000
13 59000000000000
14 635000000000000
15 6800000000000000
16 72500000000000000
17 770000000000000000
18 8150000000000000000

List of values

[5, 95, 1400, 18500, 230000, 2750000, 32000000, 365000000, 4100000000, 45500000000, 500000000000, 5450000000000, 59000000000000, 635000000000000, 6800000000000000, 72500000000000000, 770000000000000000, 8150000000000000000]

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

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