a(n) = Product_{i=2..n} A001222(i) * Sum_{i=2..n} 1/A001222(i).

Terms

a(0) =1a(1) =2a(2) =5a(3) =7a(4) =16a(5) =20a(6) =64a(7) =140a(8) =304a(9) =352a(10) =1104a(11) =1248a(12) =2640a(13) =5568a(14) =22848a(15) =25152a(16) =77760a(17) =84672a(18) =260928a(19) =542592a(20) =1126656a(21) =1209600a(22) =4921344a(23) =10174464a(24) =21012480a(25) =64364544a(26) =197074944a(27) =209018880a(28) =639000576a(29) =674832384