Numbers k such that 7*10^k - 11 is prime.

Terms

a(0) =1a(1) =6a(2) =7a(3) =9a(4) =10a(5) =11a(6) =16a(7) =42a(8) =53a(9) =78a(10) =321a(11) =699a(12) =1858a(13) =3425a(14) =4899a(15) =5734a(16) =11081a(17) =11675a(18) =12136a(19) =14056a(20) =16074a(21) =77969a(22) =158465