Numbers k such that 4*10^k + 87 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =13a(5) =25a(6) =27a(7) =32a(8) =37a(9) =38a(10) =40a(11) =45a(12) =57a(13) =80a(14) =91a(15) =151a(16) =214a(17) =441a(18) =644a(19) =764a(20) =797a(21) =1222a(22) =2329a(23) =2931a(24) =4324a(25) =21794a(26) =22396a(27) =24041a(28) =46420a(29) =51489