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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.

A236672 Start with 9; thereafter, primes obtained by concatenating to the end of previous term the next smallest number that will produce a prime.

Table of values

n a(n)
1 9
2 97
3 971
4 9719
5 971917
6 97191713
7 9719171333
8 971917133323
9 9719171333237
10 971917133323777
11 97191713332377731
12 9719171333237773159
13 971917133323777315951
14 97191713332377731595127
15 971917133323777315951277
16 971917133323777315951277269

List of values

[9, 97, 971, 9719, 971917, 97191713, 9719171333, 971917133323, 9719171333237, 971917133323777, 97191713332377731, 9719171333237773159, 971917133323777315951, 97191713332377731595127, 971917133323777315951277, 971917133323777315951277269]

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

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