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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.

A347680 Beginning with 3, least prime > a(n-1) using only digits 2 and 3 such that every concatenation a(1),a(2),... is a palindrome.

Table of values

n a(n)
1 3
2 23
3 3323
4 233323
5 22223233323233323
6 223333322323332323332322223233323233323
7 3322233323332323332322223233323233323223333322323332323332322223233323233323

List of values

[3, 23, 3323, 233323, 22223233323233323, 223333322323332323332322223233323233323, 3322233323332323332322223233323233323223333322323332323332322223233323233323]

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

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