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

1,1

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

Mathematica

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

Crossrefs

Cf. A138920.

Sequence in context: A017764 A217677 A333689 * A303572 A152756 A265172

Adjacent sequences: A291987 A291988 A291989 * A291991 A291992 A291993

Keyword

nonn

Author

Robert Price, Sep 07 2017

Status

approved