A059303 Numbers k such that floor(e^k) + 1 is prime.

0, 1, 5, 7, 10, 105, 22959, 34888

Offset: 1

Author

Felice Russo, Jan 25 2001

Keywords

• nonn
• more

Comments

0 followed by all k such that ceiling(e^k) is prime. - Jeppe Stig Nielsen, Feb 12 2024

Links

• Eric Weisstein's World of Mathematics, e-Prime

Crossrefs

Cf. A001671, A050808.

Programs

Mathematica

Select[Range[40000], PrimeQ[Floor[E^#] + 1] &] (* G. C. Greubel, Jan 06 2017 *)

PARI

isok(k) = isprime(floor(exp(k))+1) \\ Michel Marcus, Jun 08 2013

Extensions

Corrected by Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 25 2001

a(7)-a(8) from Donovan Johnson