a(n) = prime(2*n-1)*prime(2*n).

Terms

a(0) =6a(1) =35a(2) =143a(3) =323a(4) =667a(5) =1147a(6) =1763a(7) =2491a(8) =3599a(9) =4757a(10) =5767a(11) =7387a(12) =9797a(13) =11021a(14) =12317a(15) =16637a(16) =19043a(17) =22499a(18) =25591a(19) =28891a(20) =32399a(21) =36863a(22) =39203a(23) =47053a(24) =51983a(25) =55687a(26) =60491a(27) =67591a(28) =72899a(29) =77837