Numbers k such that (23*10^k - 47)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =11a(5) =28a(6) =34a(7) =35a(8) =36a(9) =49a(10) =65a(11) =90a(12) =126a(13) =1878a(14) =2089a(15) =3266a(16) =3818a(17) =6485a(18) =7710a(19) =8539a(20) =20603a(21) =34764a(22) =51283a(23) =176964a(24) =258494