Denominator of Product_{k=1..n-1} k^(2k-n-1).

Terms

a(0) =1a(1) =2a(2) =1a(3) =6a(4) =1a(5) =16a(6) =9a(7) =5a(8) =1a(9) =16a(10) =1a(11) =28a(12) =225a(13) =2048a(14) =1a(15) =729a(16) =1a(17) =125a(18) =49a(19) =11a(20) =1a(21) =55296a(22) =625a(23) =13a(24) =59049a(25) =43904a(26) =1a(27) =8a(28) =1a(29) =67108864