Semiprime 12-gonal numbers.

Terms

a(0) =33a(1) =217a(2) =793a(3) =4681a(4) =6697a(5) =9073a(6) =22177a(7) =58969a(8) =80137a(9) =96049a(10) =113401a(11) =132193a(12) =197209a(13) =221761a(14) =289441a(15) =382537a(16) =470017a(17) =607609a(18) =671977a(19) =694153a(20) =935713a(21) =1042417a(22) =1069993a(23) =1493857a(24) =1627921a(25) =1803601a(26) =1876393a(27) =2181961a(28) =2261953a(29) =2510569