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

Terms

a(0) =1a(1) =0a(2) =4a(3) =10a(4) =0a(5) =20a(6) =0a(7) =56a(8) =0a(9) =0a(10) =0a(11) =84a(12) =0a(13) =0a(14) =0a(15) =120a(16) =0a(17) =2300a(18) =0a(19) =560a(20) =0a(21) =0a(22) =0a(23) =1140a(24) =0a(25) =0a(26) =0a(27) =349504a(28) =0a(29) =2362041