%I #6 Mar 18 2021 23:28:39
%S 0,0,1,0,1,3,6,11,23,44,91,179,364,723,1457,2902,5827,11633,23310,
%T 46573,93237,186386,372951,745717,1491798,2983237,5967197,11933660,
%U 23868777,47736109,95475120,190947315,381900457,763795108,1527601849,3055192021,6110407352
%N Number of binary words of length n (beginning 0) with autocorrelation function 2^(n-1)+3.
%F a(2*n-1) = 2*a(2*n-2) + a(n) for n>=3; a(2*n) = 2*a(2*n-1) + a(n) - a(n+1) for n>=3. [Corrected by _Sean A. Irvine_, Mar 18 2021]
%K nonn
%O 1,6
%A TORSTEN.SILLKE(AT)LHSYSTEMS.COM
%E More terms from _Sean A. Irvine_, Mar 18 2021