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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.

A068704 a(n) = smallest prime obtained as the concatenation of n^k, n^(k-1), n^(k-2), ..., n^2, n, 1 for some k >= 1; or 0 if no such prime exists.

Table of values

n a(n)
1 11
2 421
3 31
4 41
5 2551
6 61
7 71
8 6481
9 8191
10 101

List of values

[11, 421, 31, 41, 2551, 61, 71, 6481, 8191, 101]

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

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