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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.

A386964 a(1) = prime(1) = 2, a(n) = 10*a(n-1) + (prime(n) mod 10).

Table of values

n a(n)
1 2
2 23
3 235
4 2357
5 23571
6 235713
7 2357137
8 23571379
9 235713793
10 2357137939
11 23571379391
12 235713793917
13 2357137939171
14 23571379391713
15 235713793917137
16 2357137939171373
17 23571379391713739
18 235713793917137391
19 2357137939171373917
20 23571379391713739171
21 235713793917137391713

List of values

[2, 23, 235, 2357, 23571, 235713, 2357137, 23571379, 235713793, 2357137939, 23571379391, 235713793917, 2357137939171, 23571379391713, 235713793917137, 2357137939171373, 23571379391713739, 235713793917137391, 2357137939171373917, 23571379391713739171, 235713793917137391713]

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

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