Numbers n such that 2*n*3^n - 1 is prime.

Terms

a(0) =1a(1) =4a(2) =6a(3) =10a(4) =35a(5) =112a(6) =149a(7) =390a(8) =424a(9) =566a(10) =660a(11) =664a(12) =850a(13) =1414a(14) =1436a(15) =1497a(16) =1524a(17) =1904a(18) =5116a(19) =6625a(20) =10944a(21) =12637a(22) =35691a(23) =92304