Numbers k such that the product of the first k composite numbers minus 1 is a prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =9a(4) =12a(5) =22a(6) =26a(7) =30a(8) =34a(9) =51a(10) =54a(11) =100a(12) =125a(13) =155a(14) =168a(15) =173a(16) =220a(17) =401a(18) =494a(19) =2161a(20) =2539a(21) =2866a(22) =7625a(23) =9644a(24) =12099a(25) =13470a(26) =16078a(27) =18587a(28) =30075a(29) =37067