a(n) = denominator of Sum_{i=1..n} 1/A171397(i).

Terms

a(0) =1a(1) =2a(2) =6a(3) =12a(4) =60a(5) =20a(6) =140a(7) =280a(8) =2520a(9) =27720a(10) =27720a(11) =360360a(12) =360360a(13) =360360a(14) =720720a(15) =12252240a(16) =4084080a(17) =77597520a(18) =77597520a(19) =77597520a(20) =1784742960a(21) =1784742960a(22) =8923714800a(23) =8923714800a(24) =80313433200a(25) =11473347600a(26) =332727080400a(27) =332727080400a(29) =937685408400a(30) =937685408400