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

A045694

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

Terms

    a(0) =1a(1) =2a(2) =6a(3) =16a(4) =48a(5) =138a(6) =414a(7) =1226a(8) =3678a(9) =10986a(10) =32958a(11) =98736a(12) =296208a(13) =888210a(14) =2664630a(15) =7992664a(16) =23977992a(17) =71930298a(18) =215790894a(19) =647361696a(20) =1942085088a(21) =5826222306a(22) =17478666918a(23) =52435902018a(24) =157307706054a(25) =471922821954

External references