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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.

A093402 Primes of the form 40*R_k + 9, where R_k is the repunit (A002275) of length k.

Table of values

n a(n)
1 449
2 44449
3 444449
4 444444444444444444444444444444444444444444444449
5 444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444449

List of values

[449, 44449, 444449, 444444444444444444444444444444444444444444444449, 444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444449]

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

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