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.

A323745 a(n) is the smallest prime that becomes composite if any single digit of its base-n expansion is changed to a different digit (but not to zero).

Table of values

n a(n)
2 3
3 2
4 89
5 67
6 28151
7 223
8 6211
9 2789
10 294001
11 701
12 8399011
13 2423
14 691063
15 243367
16 527099
17 10513
18 2078920243
19 10909
20 169402249
21 2114429
22 156760543
23 68543
24 96733308587
25 181141
26 121660507
27 6139219
28 3141223681
29 114493

List of values

[3, 2, 89, 67, 28151, 223, 6211, 2789, 294001, 701, 8399011, 2423, 691063, 243367, 527099, 10513, 2078920243, 10909, 169402249, 2114429, 156760543, 68543, 96733308587, 181141, 121660507, 6139219, 3141223681, 114493]

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

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