cp's OEIS Frontend

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.

A075601 a(1) = 13 and then the smallest prime that is obtained by placing digits on both sides of the previous term. Or smallest prime that encompasses a(n-1).

Table of values

n a(n)
1 13
2 2131
3 121313
4 51213137
5 3512131379
6 135121313797
7 21351213137977
8 5213512131379777
9 352135121313797771
10 63521351213137977713
11 16352135121313797771319
12 9163521351213137977713193

List of values

[13, 2131, 121313, 51213137, 3512131379, 135121313797, 21351213137977, 5213512131379777, 352135121313797771, 63521351213137977713, 16352135121313797771319, 9163521351213137977713193]

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

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