Lesser of two semiprimes sandwiched each between semiprimes thus forming a twin semiprime-triple.

Terms

a(0) =214a(1) =143098a(2) =194758a(3) =206134a(4) =273418a(5) =684898a(6) =807658a(7) =1373938a(8) =1391758a(9) =1516534a(10) =1591594a(11) =1610998a(12) =1774798a(13) =1882978a(14) =1891762a(15) =2046454a(16) =2051494a(17) =2163418a(18) =2163958a(19) =2338054a(20) =2359978a(21) =2522518a(22) =2913838a(23) =3108202a(24) =4221754a(25) =4297318a(26) =4334938a(27) =4866118a(28) =4988878a(29) =5108794