Product_{i=1..n} A173557(i).

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =8a(5) =16a(6) =96a(7) =96a(8) =192a(9) =768a(10) =7680a(11) =15360a(12) =184320a(13) =1105920a(14) =8847360a(15) =8847360a(16) =141557760a(17) =283115520a(18) =5096079360a(19) =20384317440a(20) =244611809280