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.

A213355 Smallest prime p whose k-fold digit sum s(s(..s(p)..)) is also prime for all k < n, but whose n-fold digit sum is not prime.

Table of values

n	a(n)
1	13
2	67
3	59899999

List of values

[13, 67, 59899999]

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

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