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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.

A079637 Smallest prime p with audioactive "echo" of at least n, that is, the finite sequence p_0 = p, p_1 = LookAndSay(p_0), ..., p_n = LookAndSay(p_(n-1)) consists entirely of primes.

Table of values

n a(n)
0 2
1 3
2 7
3 233
4 233
5 233
6 19972667609
7 75022592087629

List of values

[2, 3, 7, 233, 233, 233, 19972667609, 75022592087629]

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

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