a(n) = denominator of sum{k=1 to n} 1/A127515(k).

Terms

a(0) =1a(1) =2a(2) =6a(3) =30a(4) =60a(5) =420a(6) =840a(7) =280a(8) =2520a(9) =2520a(10) =2520a(11) =27720a(12) =27720a(13) =27720a(14) =471240a(15) =942480a(16) =314160a(17) =9110640a(18) =9110640a(19) =1822128a(20) =41908944a(21) =209544720a(22) =2724081360a(23) =908027120a(24) =17252515280a(25) =17252515280a(26) =17252515280a(27) =17252515280a(28) =465817912560