a(n) = least k such that for any m>=0 k*sum(1<=u<=v<=w<=m,u^n*v/w) is an integer.

Terms

a(0) =6a(1) =12a(2) =60a(3) =60a(4) =84a(5) =84a(6) =60a(7) =60a(8) =132a(9) =132a(10) =5460a(11) =5460a(12) =12a(13) =12a(14) =1020a(15) =1020a(16) =1596a(17) =1596a(18) =660a(19) =660a(20) =276a(21) =276a(22) =5460a(23) =5460a(24) =12a(25) =12a(26) =60a(27) =60a(28) =28644a(29) =28644