a(n) = A000010(A000129(n)).

Terms

a(0) =1a(1) =1a(2) =4a(3) =4a(4) =28a(5) =24a(6) =156a(7) =128a(8) =784a(9) =1120a(10) =5740a(11) =2880a(12) =33460a(13) =37128a(14) =150080a(15) =147456a(16) =1128256a(17) =931392a(18) =6446016a(19) =4677120a(20) =28514304a(21) =44450560a(22) =224075664a(23) =106168320a(24) =1265644800a(25) =1560708240a(26) =5970392064a(27) =5588803584a(28) =44560482148a(29) =33497856000