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A045692 Number of binary words of length n (beginning 0) with autocorrelation function 2^(n-1)+2. 0

%I

%S 0,0,0,1,2,3,8,13,30,55,116,221,458,895,1816,3589,7238,14391,28892,

%T 57613,115458,230579,461600,922521,1845958,3690563,7382916,14763121,

%U 29529874,59054343,118115864,236220901,472456278,944890927,1889810636,3779577989,7559213762

%N Number of binary words of length n (beginning 0) with autocorrelation function 2^(n-1)+2.

%F a(2*n-1) = 2*a(2*n-2) + 2*a(n) for n > 4; a(2*n) = 2*a(2*n-1) - a(n) - a(n+1) for n > 4.

%K nonn

%O 1,5

%A TORSTEN.SILLKE(AT)LHSYSTEMS.COM

%E More terms from _Sean A. Irvine_, Mar 18 2021

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Last modified May 20 23:05 EDT 2022. Contains 353886 sequences. (Running on oeis4.)