Smallest k such that the k-th tetrahedral number is divisible by exactly n tetrahedral numbers.

Terms

a(0) =1a(1) =2a(2) =6a(3) =4a(4) =8a(5) =28a(6) =14a(7) =48a(8) =55a(9) =98a(10) =154a(11) =54a(12) =495a(13) =1034a(14) =504a(15) =559a(16) =208a(17) =440a(18) =2078a(19) =2000a(20) =350a(21) =3519a(22) =6578a(23) =2574a(24) =5983a(25) =2924a(26) =21734a(27) =25023a(28) =11934a(29) =30303