Numbers k such that 2*10^k + 51 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =8a(5) =22a(6) =68a(7) =70a(8) =109a(9) =112a(10) =144a(11) =154a(12) =318a(13) =418a(14) =451a(15) =536a(16) =638a(17) =1540a(18) =1590a(19) =2935a(20) =3859a(21) =8770a(22) =9860a(23) =70688a(24) =133955a(25) =161766a(26) =166458