A088554 Primes of the form (5^k-1)/4 or (5^k+3)/4.
2, 7, 31, 157, 3907, 19531, 2441407, 12207031, 61035157, 305175781, 9313225746154785157, 177635683940025046467781066894531
Offset: 1
Keywords
Links
- Amiram Eldar, Table of n, a(n) for n = 1..19
Crossrefs
Cf. A004061.
Programs
-
Mathematica
With[{kmax = 100}, Select[Flatten[Table[(5^k + {-1, 3})/4, {k, 0, kmax}]], PrimeQ]] (* Amiram Eldar, Jul 05 2024 *)
Extensions
Edited by Don Reble, May 03 2006