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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.

A215475 Number of n-ary n-tuples (a_1,...,a_n) such that the string a_1...a_n is preprime.

Table of values

n a(n)
1 1
2 3
3 14
4 90
5 829
6 9695
7 141280
8 2447592
9 49212093
10 1125217654
11 28823053258
12 817378772782
13 25417591386199
14 859893804621774
15 31439503146486552
16 1235301513403984512
17 51906185332282554369
18 2322562816163062723410
19 110253678955655801174716
20 5534198888175777261628156

List of values

[1, 3, 14, 90, 829, 9695, 141280, 2447592, 49212093, 1125217654, 28823053258, 817378772782, 25417591386199, 859893804621774, 31439503146486552, 1235301513403984512, 51906185332282554369, 2322562816163062723410, 110253678955655801174716, 5534198888175777261628156]

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

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