Numbers k such that k![7]-1 is prime (where k![7] = A114799(k) = septuple factorial).

Terms

a(0) =3a(1) =4a(2) =6a(3) =8a(4) =9a(5) =10a(6) =11a(7) =12a(8) =14a(9) =17a(10) =20a(11) =24a(12) =30a(13) =31a(14) =32a(15) =46a(16) =52a(17) =54a(18) =59a(19) =98a(20) =104a(21) =143a(22) =145a(23) =160a(24) =174a(25) =198a(26) =199a(27) =202a(28) =212a(29) =215