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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.

A065848 Let u be any string of n digits from {0,...,6}; let f(u) = number of distinct primes, not beginning with 0, formed by permuting the digits of u to a base-7 number; then a(n) = max_u f(u).

Table of values

n a(n)
1 1
2 2
3 5
4 15
5 45
6 154
7 674
8 3575
9 14946
10 68308
11 345653
12 1931846
13 9776107
14 51415223
15 311415054

List of values

[1, 2, 5, 15, 45, 154, 674, 3575, 14946, 68308, 345653, 1931846, 9776107, 51415223, 311415054]

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

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