Numbers k such that 1 + product of first k composite numbers is prime.

Terms

a(0) =1a(1) =3a(2) =7a(3) =11a(4) =16a(5) =22a(6) =39a(7) =76a(8) =116a(9) =139a(10) =149a(11) =169a(12) =179a(13) =220a(14) =372a(15) =429a(16) =1216a(17) =2146a(18) =3176a(19) =5382a(20) =5969a(21) =12271a(22) =15271a(23) =43903a(24) =75362a(25) =87511a(26) =228162a(27) =691499