a(n) is the least integer greater than a(n-1) such that a(n-1)*2^a(n) + 1 is prime, a(1) = 1.
A046808
a(n) is the least integer greater than a(n-1) such that a(n-1)*2^a(n) + 1 is prime, a(1) = 1.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =14a(6) =19a(7) =46a(8) =48a(9) =62a(10) =67a(11) =74a(12) =81a(13) =89a(14) =589a(15) =2090a(16) =2299a(17) =7742a(18) =1925975a(19) =1989191a(20) =2008551a(21) =4371904a(22) =6487918
External references
- oeis: A046808