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.

A335051 a(n) is the smallest decimal number > 1 such that when it is written in all bases from base 2 to base n those numbers all contain both 0 and 1.

Table of values

n a(n)
2 2
3 9
4 19
5 28
6 145
7 384
8 1128
9 2601
10 2601
11 101256
12 103824
13 382010
14 572101
15 971400
16 1773017
17 1773017
18 22873201
19 64041048
20 64041048
21 1193875201
22 2496140640
23 10729882801
24 21660922801
25 120068616277
26 333679563001
27 427313653201
28 427313653201
29 10436523921264
30 10868368953601

List of values

[2, 9, 19, 28, 145, 384, 1128, 2601, 2601, 101256, 103824, 382010, 572101, 971400, 1773017, 1773017, 22873201, 64041048, 64041048, 1193875201, 2496140640, 10729882801, 21660922801, 120068616277, 333679563001, 427313653201, 427313653201, 10436523921264, 10868368953601]

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

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