a(n) = n! / A156832(n).

Terms

a(0) =1a(1) =2a(2) =6a(3) =8a(4) =5a(5) =8a(6) =7a(7) =16a(8) =36a(9) =30a(10) =66a(11) =81a(12) =78a(13) =126a(14) =84a(15) =320a(16) =272a(17) =576a(18) =1824a(19) =2048a(20) =640a(21) =315a(22) =322a(23) =231a(24) =525a(25) =195a(26) =648a(27) =256a(28) =261a(29) =216