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

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

Offset: 1

Author

Robert Price, Sep 07 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..18
• Yves Gallot, Cyclotomic polynomials and prime numbers
• Index entries for cyclotomic polynomials,values at X

Crossrefs

Cf. A138920.

Programs

Mathematica

Select[Table[Cyclotomic[k,-10], {k, 3, 100}], PrimeQ[#] &]