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.

A062209 Numbers k such that the smoothly undulating palindromic number (4*10^k-7)/33 = 121...21 is a prime (or PRP).

Table of values

n a(n)
1 7
2 11
3 43
4 139
5 627
6 1399
7 1597
8 1979
9 7809
10 14059
11 46499

List of values

[7, 11, 43, 139, 627, 1399, 1597, 1979, 7809, 14059, 46499]