Numbers of the form prime(n)*(prime(n)-1)/4.

Terms

a(0) =5a(1) =39a(2) =68a(3) =203a(4) =333a(5) =410a(6) =689a(7) =915a(8) =1314a(9) =1958a(10) =2328a(11) =2525a(12) =2943a(13) =3164a(14) =4658a(15) =5513a(16) =6123a(17) =7439a(18) =8145a(19) =9264a(20) =9653a(21) =13053a(22) =13514a(23) =14460a(24) =16448a(25) =18023a(26) =19113a(27) =19670a(28) =21389a(29) =24414