Triangular numbers which are the product of two primes.

Terms

a(0) =6a(1) =10a(2) =15a(3) =21a(4) =55a(5) =91a(6) =253a(7) =703a(8) =1081a(9) =1711a(10) =1891a(11) =2701a(12) =3403a(13) =5671a(14) =12403a(15) =13861a(16) =15931a(17) =18721a(18) =25651a(19) =34453a(20) =38503a(21) =49141a(22) =60031a(23) =64261a(24) =73153a(25) =79003a(26) =88831a(27) =104653a(28) =108811a(29) =114481