Numbers k such that (3^k + 5)/2 is prime.

Terms

a(0) =0a(1) =2a(2) =4a(3) =6a(4) =10a(5) =60a(6) =66a(7) =100a(8) =144a(9) =156a(10) =450a(11) =454a(12) =456a(13) =744a(14) =1354a(15) =1942a(16) =2074a(17) =2556a(18) =3252a(19) =4300a(20) =9148a(21) =10318a(22) =10806a(23) =19518a(24) =26182a(25) =83580