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.

A030456 a(0) = 2; a(n) is smallest prime containing a(n-1) as substring.

Table of values

n a(n)
0 2
1 23
2 223
3 1223
4 12239
5 122393
6 1223939
7 12239393
8 122393939
9 1223939399
10 12239393993
11 122393939933
12 12239393993311
13 412239393993311
14 8412239393993311
15 78412239393993311
16 2378412239393993311
17 23784122393939933111
18 2623784122393939933111
19 26237841223939399331111

List of values

[2, 23, 223, 1223, 12239, 122393, 1223939, 12239393, 122393939, 1223939399, 12239393993, 122393939933, 12239393993311, 412239393993311, 8412239393993311, 78412239393993311, 2378412239393993311, 23784122393939933111, 2623784122393939933111, 26237841223939399331111]

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

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