Least k such that Sum_{i=1..n} k^i / i is a positive integer.

Terms

a(0) =1a(1) =2a(2) =6a(3) =6a(4) =30a(5) =10a(6) =70a(7) =70a(8) =210a(9) =168a(10) =1848a(11) =1848a(12) =18018a(13) =8580a(14) =2574a(15) =2574a(16) =102102a(17) =102102a(18) =831402a(19) =2771340a(20) =3233230a(21) =587860a(22) =43266496a(23) =117630786a(24) =162249360a(25) =145088370a(26) =145088370a(27) =2897310a(28) =672175920a(29) =672175920