Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 5^(2^m) + 1 for some m.
A268658
Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 5^(2^m) + 1 for some m.
Terms
- a(0) =2a(1) =8a(2) =18a(3) =66a(4) =189a(5) =209a(6) =408a(7) =2208a(8) =2816a(9) =3168a(10) =3912a(11) =20909a(12) =54792a(13) =59973a(14) =157169a(15) =303093a(16) =709968a(17) =801978a(18) =1832496a(19) =2145353a(20) =2291610a(21) =5082306a(22) =10829346a(23) =16408818
External references
- oeis: A268658