Numbers k equal prime(n)*prime(n+1) such that k+1 is a square and k-1 is even semiprime.

Terms

a(0) =15a(1) =35a(2) =143a(3) =899a(4) =1763a(5) =5183a(6) =19043a(7) =79523a(8) =213443a(9) =359999a(10) =412163a(11) =685583a(12) =777923a(13) =1192463a(14) =1695203a(15) =2585663a(16) =4536899a(17) =5143823a(18) =5673923a(19) =7225343a(20) =12446783a(21) =12659363a(22) =12830723a(23) =17040383a(24) =17892899a(25) =18818243a(26) =20684303a(27) =25100099