Smallest triangular number with digit sum n (or 0 if no such number exists).

Terms

a(0) =1a(1) =0a(2) =3a(3) =0a(4) =0a(5) =6a(6) =0a(7) =0a(8) =36a(9) =28a(10) =0a(11) =66a(12) =0a(13) =0a(14) =78a(15) =0a(16) =0a(17) =378a(18) =496a(19) =0a(20) =1596a(21) =0a(22) =0a(23) =8385a(24) =0a(25) =0a(26) =5778a(27) =5995a(28) =0a(29) =8778