Greatest k such that (k-th prime) < (6 times n-th prime).

Terms

a(0) =5a(1) =7a(2) =10a(3) =13a(4) =18a(5) =21a(6) =26a(7) =30a(8) =33a(9) =40a(10) =42a(11) =47a(12) =53a(13) =55a(14) =60a(15) =66a(16) =71a(17) =72a(18) =79a(19) =82a(20) =84a(21) =91a(22) =94a(23) =99a(24) =106a(25) =110a(26) =113a(27) =116a(28) =119a(29) =123