Smallest triangular number with exactly n divisors, or 0 if no such number exists.

Terms

a(0) =1a(1) =3a(2) =0a(3) =6a(4) =0a(5) =28a(6) =0a(7) =66a(8) =36a(9) =496a(10) =0a(11) =276a(12) =0a(13) =8128a(14) =1631432881a(15) =120a(16) =0a(17) =300a(18) =0a(19) =528a(20) =0a(22) =0a(23) =630a(24) =0a(25) =33550336a(27) =8256a(28) =0a(29) =209628a(30) =0a(31) =3570