Partial products of A051953; a(1) = 1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =8a(6) =8a(7) =32a(8) =96a(9) =576a(10) =576a(11) =4608a(12) =4608a(13) =36864a(14) =258048a(15) =2064384a(16) =2064384a(17) =24772608a(18) =24772608a(19) =297271296a(20) =2675441664a(21) =32105299968a(22) =32105299968a(23) =513684799488