Twin prime products minus 2.

Terms

a(0) =13a(1) =33a(2) =141a(3) =321a(4) =897a(5) =1761a(6) =3597a(7) =5181a(8) =10401a(9) =11661a(10) =19041a(11) =22497a(12) =32397a(13) =36861a(14) =39201a(15) =51981a(16) =57597a(17) =72897a(18) =79521a(19) =97341a(20) =121101a(21) =176397a(22) =186621a(23) =213441a(24) =272481a(25) =324897a(26) =359997a(27) =381921a(28) =412161a(29) =435597