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.

A145381 Prime numbers p such that p^2 is a concatenation of decimal representations of m and m-1 for some integer m.

Table of values

n a(n)
1 9901
2 99990001
3 999999000001
4 9999999900000001
5 811451682377384625400019885321
6 666809750614092756440997454321145572124297

List of values

[9901, 99990001, 999999000001, 9999999900000001, 811451682377384625400019885321, 666809750614092756440997454321145572124297]

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

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