Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #4 Oct 02 2023 10:38:16
%S 1,0,1,2,0,4,4,0,16,0,16,32,0,64,64,0,256,0,256,512,0,1024,1024,0,
%T 4096,0,4096,8192,0,16384,16384,0,65536,0,65536,131072,0,262144,
%U 262144,0,1048576
%N Expansion of (1+x)^2/(1+2x-4x^3-4x^4).
%C Binomial transform is A116404.
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-2, 0, 4, 4).
%F a(n)=-2a(n-1)+4a(n-3)+4a(n-4)
%K easy,nonn
%O 0,4
%A _Paul Barry_, Feb 07 2006