cp's OEIS Frontend

A111435 a(n) = Fibonacci(hexanacci(n)).

%I A111435 #5 Aug 09 2018 20:18:14
%S A111435 0,0,0,0,0,1,1,1,3,21,987,2178309,6557470319842,
%T A111435 59425114757512643212875125,
%U A111435 3016128079338728432528443992613633888712980904400501
%N A111435 a(n) = Fibonacci(hexanacci(n)).
%F A111435 a(n) = A000045(A001592(n)).
%e A111435 a(0) = Fibonacci(hexanacci(0)) = A000045(A001592(0)) = A000045(0) = 0.
%e A111435 a(1) = Fibonacci(hexanacci(1)) = A000045(A001592(1)) = A000045(0) = 0.
%e A111435 a(2) = Fibonacci(hexanacci(2)) = A000045(A001592(2)) = A000045(0) = 0.
%e A111435 a(3) = Fibonacci(hexanacci(3)) = A000045(A001592(3)) = A000045(0) = 0.
%e A111435 a(4) = Fibonacci(hexanacci(4)) = A000045(A001592(4)) = A000045(0) = 0.
%e A111435 a(5) = Fibonacci(hexanacci(5)) = A000045(A001592(5)) = A000045(1) = 1.
%e A111435 a(6) = Fibonacci(hexanacci(6)) = A000045(A001592(6)) = A000045(1) = 1.
%e A111435 a(7) = Fibonacci(hexanacci(7)) = A000045(A001592(7)) = A000045(2) = 1.
%e A111435 a(8) = A000045(A001592(8)) = A000045(4) = 3.
%e A111435 a(9) = A000045(A001592(9)) = A000045(8) = 21.
%e A111435 a(10) = A000045(A001592(10)) = A000045(16) = 987.
%e A111435 a(11) = A000045(A001592(11)) = A000045(32) = 2178309.
%e A111435 a(12) = A000045(A001592(12)) = A000045(63) = 6557470319842.
%p A111435 b:= proc(n) option remember; `if`(n<5, 0,
%p A111435       `if`(n=5, 1, add(b(n-j), j=1..6)))
%p A111435     end:
%p A111435 a:= n-> (<<0|1>, <1|1>>^b(n))[1,2]:
%p A111435 seq(a(n), n=0..14);  # _Alois P. Heinz_, Aug 09 2018
%Y A111435 Cf. A000045, A001592, A066178, A007570.
%K A111435 easy,nonn
%O A111435 0,9
%A A111435 _Jonathan Vos Post_, Nov 13 2005