a(1) = 1, a(n+1) is the numerator of n-th partial fraction of the continued fraction [1; 3, 9, 27, ..., 3^n].

A280219

a(1) = 1, a(n+1) is the numerator of n-th partial fraction of the continued fraction [1; 3, 9, 27, ..., 3^n].

Terms

    a(0) =1a(1) =4a(2) =37a(3) =1003a(4) =81280a(5) =19752043a(6) =14399320627

External references