2^(n-1)-th term of the row sums of triangle A093654.

A093657

2^(n-1)-th term of the row sums of triangle A093654.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =28a(4) =206a(5) =2418a(6) =45970a(7) =1440746a(8) =75840096a(9) =6828414424

External references