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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.

A232448 Indices of Belphegor primes: numbers k such that the decimal number 1 0...0(k 0's) 666 0...0(k 0's) 1 (i.e., A232449(k)) is prime.

Table of values

n a(n)
1 0
2 13
3 42
4 506
5 608
6 2472
7 2623
8 28291
9 181298

List of values

[0, 13, 42, 506, 608, 2472, 2623, 28291, 181298]

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

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