Smallest prime q such that q + prime(n) is power of 6 or 0 if no such q exists.

Terms

a(0) =0a(1) =3a(2) =31a(3) =29a(4) =0a(5) =23a(6) =19a(7) =17a(8) =13a(9) =7a(10) =0a(11) =179a(12) =0a(13) =173a(14) =1249a(15) =163a(16) =157a(17) =0a(18) =149a(19) =0a(20) =1223a(21) =137a(22) =1213a(23) =127a(24) =46559a(25) =0a(26) =113a(27) =109a(28) =107a(29) =103