Numbers k such that 2*k! - 1 is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =14a(7) =15a(8) =17a(9) =22a(10) =28a(11) =91a(12) =253a(13) =257a(14) =298a(15) =659a(16) =832a(17) =866a(18) =1849a(19) =2495a(20) =2716a(21) =2773a(22) =2831a(23) =3364a(24) =5264a(25) =7429a(26) =28539a(27) =32123a(28) =37868a(29) =65591