Denominator of Sum_{i=1..n} n^i/i.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =5a(6) =20a(7) =105a(8) =280a(9) =63a(10) =2520a(11) =385a(12) =5544a(13) =6435a(14) =8008a(15) =45045a(16) =144144a(17) =85085a(18) =116688a(19) =2909907a(20) =739024a(21) =146965a(22) =232792560a(23) =37182145a(24) =356948592a(25) =128707425a(26) =2974571600a(27) =717084225a(28) =80313433200a(29) =215656441