Numbers k such that (86*10^k + 121)/9 is prime.

Terms

a(0) =0a(1) =1a(2) =4a(3) =6a(4) =24a(5) =52a(6) =60a(7) =76a(8) =94a(9) =106a(10) =136a(11) =196a(12) =283a(13) =319a(14) =486a(15) =1560a(16) =1615a(17) =1747a(18) =2188a(19) =2359a(20) =5004a(21) =5608a(22) =9301a(23) =22086a(24) =30391a(25) =76128a(26) =90588a(27) =139315