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.

A055866 Largest number that has the same number of digits in base 10 and base n, or 0 if no such number exists.

Table of values

n a(n)
2 1
3 2
4 15
5 124
6 1295
7 117648
8 1073741823
9 109418989131512359208
10 0
11 9999999999999999999999999
12 9999999999999
13 999999999
14 9999999
15 999999
16 99999
17 99999
18 9999
19 9999
20 9999
21 9999
22 999
23 999
24 999
25 999
26 999
27 999
28 999
29 999
30 999

List of values

[1, 2, 15, 124, 1295, 117648, 1073741823, 109418989131512359208, 0, 9999999999999999999999999, 9999999999999, 999999999, 9999999, 999999, 99999, 99999, 9999, 9999, 9999, 9999, 999, 999, 999, 999, 999, 999, 999, 999, 999]

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

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