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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.

A291990 Primes of the form Phi(k, -10), where Phi is the cyclotomic polynomial.

Table of values

n a(n)
1 101
2 9091
3 909091
4 9901
5 909090909090909091
6 99990001
7 909090909090909090909090909091
8 999999000001
9 1111111111111111111
10 11111111111111111111111
11 9999999900000001
12 9090909090909090909090909090909090909090909090909091

List of values

[101, 9091, 909091, 9901, 909090909090909091, 99990001, 909090909090909090909090909091, 999999000001, 1111111111111111111, 11111111111111111111111, 9999999900000001, 9090909090909090909090909090909090909090909090909091]

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

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