a(n) = gcd(F(n), product{k|n,k<n} F(k)), where F(k) is k-th Fibonacci number.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =3a(8) =2a(9) =5a(10) =1a(11) =48a(12) =1a(13) =13a(14) =10a(15) =21a(16) =1a(17) =136a(18) =1a(19) =165a(20) =26a(21) =89a(22) =1a(23) =2016a(24) =5a(25) =233a(26) =34a(27) =1131a(28) =1a(29) =26840