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

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =3a(6) =8a(7) =13a(8) =30a(9) =55a(10) =116a(11) =221a(12) =458a(13) =895a(14) =1816a(15) =3589a(16) =7238a(17) =14391a(18) =28892a(19) =57613a(20) =115458a(21) =230579a(22) =461600a(23) =922521a(24) =1845958a(25) =3690563a(26) =7382916a(27) =14763121a(28) =29529874a(29) =59054343