Numbers n such that n and n+2 are of the form p^2*q where p and q are distinct primes.

Terms

a(0) =18a(1) =50a(2) =242a(3) =423a(4) =475a(5) =603a(6) =637a(7) =722a(8) =845a(9) =925a(10) =1682a(11) =1773a(12) =2007a(13) =2523a(14) =2525a(15) =2527a(16) =3175a(17) =3177a(18) =4203a(19) =4475a(20) =4525a(21) =4923a(22) =5823a(23) =6725a(24) =6811a(25) =6962a(26) =7299a(27) =7442a(28) =7675a(29) =8425