a(n) = prime(n)*(prime(n+1) + 1).

Terms

a(0) =8a(1) =18a(2) =40a(3) =84a(4) =154a(5) =234a(6) =340a(7) =456a(8) =690a(9) =928a(10) =1178a(11) =1554a(12) =1804a(13) =2064a(14) =2538a(15) =3180a(16) =3658a(17) =4148a(18) =4824a(19) =5254a(20) =5840a(21) =6636a(22) =7470a(23) =8722a(24) =9894a(25) =10504a(26) =11124a(27) =11770a(28) =12426a(29) =14464