A127598 - OEIS

%I #6 May 05 2014 16:20:02

%S 2,5,5,149,853,2389,17749,70997,218453,2708821,3495253,13981013,

%T 39146837,492131669,626349397,27201459541,27201459541,297784399189,

%U 297784399189,3665038759253,3665038759253,89426945725781

%N Least primes of the form k 4^n + (4^n-1)/3.

%t a = {}; Do[k = 0; While[ !PrimeQ[k 4^n + (4^n - 1)/3], k++ ]; AppendTo[a, k 4^n + (4^n - 1)/3], {n, 0, 50}]; a (*Artur Jasinski*)

%Y Cf. A035050, A007522, A127575, A127576, A127577, A127578, A127580, A127581, A087522, A127586, A127587, A127589, A127590, A127591, A127592, A127593, A127594, A127597.

%K nonn

%O 1,1

%A _Artur Jasinski_, Jan 19 2007