Triangular numbers for which the sum of the digits is a prime number.

Terms

a(0) =3a(1) =21a(2) =120a(3) =210a(4) =300a(5) =496a(6) =595a(7) =946a(8) =1378a(9) =1891a(10) =2278a(11) =2485a(12) =2926a(13) =3655a(14) =3916a(15) =4186a(16) =4465a(17) =4753a(18) =5356a(19) =5671a(20) =6328a(21) =6670a(22) =7381a(23) =7750a(24) =8128a(25) =8515a(26) =8911a(27) =9316a(28) =9730a(29) =10011