Numbers k such that (20^k + 1)^2 - 2 is prime.
A364081
Numbers k such that (20^k + 1)^2 - 2 is prime.
Terms
- a(0) =1a(1) =15a(2) =44a(3) =77a(4) =141a(5) =208a(6) =304a(7) =1169a(8) =3359a(9) =5050a(10) =22431a(11) =34935a(12) =92990
External references
- oeis: A364081