%I A015475
%S A015475 0,1,4,65,4164,1066049,1091638340,4471351706689,73258627454030916,
%T A015475 4801077413298721817665,1258573637505038759624004676,
%U A015475 1319710110525284599824799048959041
%N A015475 q-Fibonacci numbers for q=4.
%F A015475 a(n) = 4^(n-1) a(n-1) + a(n-2).
%Y A015475 Sequence in context: A119601 A058438 A041119 this_sequence A025585 A048828 
               A003360
%Y A015475 Adjacent sequences: A015472 A015473 A015474 this_sequence A015476 A015477 
               A015478
%K A015475 nonn,easy
%O A015475 0,3
%A A015475 Olivier Gerard (olivier.gerard(AT)gmail.com)