Smallest prime obtained as a sum of n terms of a geometric progression + the common ratio, or 0 if no such terms exists. Smallest prime of the form (a +ar +ar^2 + ar^3 +... ) + r.
A088121
Smallest prime obtained as a sum of n terms of a geometric progression + the common ratio, or 0 if no such terms exists. Smallest prime of the form (a +ar +ar^2 + ar^3 +... ) + r.
Terms
- a(0) =3a(1) =5a(2) =23a(3) =17a(4) =157a(5) =191a(6) =383a(7) =257a(8) =2557a(9) =9209a(10) =6143a(11) =20477a(12) =73721a(13) =147449a(14) =360439a(15) =65537a(16) =655357a(17) =786431a(18) =11010029a(19) =5242877a(20) =31457267a(21) =71303153a(22) =276824033a(23) =150994937a(24) =301989881a(25) =469762043a(26) =671088637a(27) =4026531827a(28) =2684354557
External references
- oeis: A088121