a(n) = A038040(A225546(n)).

Terms

a(0) =1a(1) =4a(2) =12a(3) =6a(4) =80a(5) =32a(6) =2304a(7) =24a(8) =27a(9) =192a(10) =1114112a(11) =72a(12) =141733920768a(13) =5120a(14) =448a(15) =10a(17) =108a(19) =480a(20) =11264a(21) =2359296a(23) =192a(24) =405a(25) =292057776128a(26) =324a(27) =13824