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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.

A065846 Let u be any string of n digits from {0,...,4}; let f(u) = number of distinct primes, not beginning with 0, formed by permuting the digits of u to a base-5 number; then a(n) = max_u f(u).

Table of values

n a(n)
1 1
2 2
3 4
4 7
5 26
6 87
7 226
8 800
9 2424
10 9975
11 40045
12 152852
13 626232
14 2317403
15 9962949
16 43599477
17 179247754
18 777881238

List of values

[1, 2, 4, 7, 26, 87, 226, 800, 2424, 9975, 40045, 152852, 626232, 2317403, 9962949, 43599477, 179247754, 777881238]

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

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