a(n) = gcd(n!, Fibonacci(n)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =8a(6) =1a(7) =21a(8) =2a(9) =5a(10) =1a(11) =144a(12) =1a(13) =13a(14) =10a(15) =21a(16) =1a(17) =136a(18) =1a(19) =165a(20) =26a(21) =1a(22) =1a(23) =46368a(24) =25a(25) =1a(26) =34a(27) =39a(28) =1a(29) =440