Semiprimes of the form n^3 - 2*n.

Terms

a(0) =4a(1) =21a(2) =115a(3) =329a(4) =2171a(5) =6821a(6) =24331a(7) =50579a(8) =79421a(9) =103729a(10) =226859a(11) =357769a(12) =704791a(13) =1092521a(14) =1224829a(15) =2048129a(16) =2247829a(17) =2685341a(18) =5177371a(19) =6967489a(20) =9393509a(21) =11089121a(22) =12648871a(23) =13651441a(24) =16974079a(25) =25153171a(26) =30663671a(27) =38272079a(28) =46267561a(29) =74617619