A118842 Primes of the form ceiling(phi^k).

2, 3, 5, 7, 47, 2207

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Eric Weisstein's World of Mathematics, Phi-Prime.

Formula

a(n) = A062724(A118841(n)). - R. J. Mathar, Sep 07 2007

Mathematica

Select[Table[Ceiling[GoldenRatio^n], {n, 20}], PrimeQ] (* James C. McMahon, Sep 15 2024 *)

Prog

(PARI) phi=(1+sqrt(5))/2; for(n=1, 1e4, if(ispseudoprime(t=ceil(phi^n)), print1(t", "))) \\ Charles R Greathouse IV, Jul 29 2011

Crossrefs

Cf. A118841.

Sequence in context: A171020 A214179 A178237 * A364831 A244595 A244597

Adjacent sequences: A118839 A118840 A118841 * A118843 A118844 A118845

Keyword

nonn,hard

Author

Eric W. Weisstein, May 01 2006

Status

approved