Semiprimes s = A001358(k) such that k, s - k and s + k are also semiprimes.

Terms

a(0) =10a(1) =15a(2) =141a(3) =166a(4) =274a(5) =298a(6) =299a(7) =687a(8) =995a(9) =1115a(10) =1227a(11) =1299a(12) =1345a(13) =1891a(14) =1945a(15) =2194a(16) =2661a(17) =2998a(18) =3093a(19) =3287a(20) =3566a(21) =3781a(22) =3902a(23) =4174a(24) =4262a(25) =4497a(26) =4798a(27) =5378a(28) =5414a(29) =5758