Numbers n such that 3*10^n+7 is prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =8a(4) =24a(5) =29a(6) =84a(7) =110a(8) =129a(9) =176a(10) =593a(11) =1137a(12) =2675a(13) =4992a(14) =26904a(15) =31572a(16) =55077a(17) =81021a(18) =122274