a(n) = floor(n! / Fibonacci(n)).

Terms

a(0) =1a(1) =2a(2) =3a(3) =8a(4) =24a(5) =90a(6) =387a(7) =1920a(8) =10672a(9) =65978a(10) =448503a(11) =3326400a(12) =26725411a(13) =231242151a(14) =2143728472a(15) =21198368680a(16) =222722246772