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.

A138861 Primes of form 10^n + 21.

Table of values

n a(n)
1 31
2 1021
3 1000000021
4 100000000000000021
5 10000000000000000000000000000000000000000000000000000021
6 100000000000000000000000000000000000000000000000000000000000000000000000000021

List of values

[31, 1021, 1000000021, 100000000000000021, 10000000000000000000000000000000000000000000000000000021, 100000000000000000000000000000000000000000000000000000000000000000000000000021]

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

Content is available under The OEIS End-User License Agreement.