Numbers k such that k!/k# + 1 is prime, where k# is the primorial function (A034386).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =8a(7) =14a(8) =20a(9) =26a(10) =34a(11) =56a(12) =104a(13) =153a(14) =182a(15) =194a(16) =217a(17) =230a(18) =280a(19) =281a(20) =462a(21) =463a(22) =529a(23) =1445a(24) =2515a(25) =3692a(26) =6187a(27) =6851a(28) =13917a(29) =17258