Number of strictly increasing addition chains of length n.

A008933

Number of strictly increasing addition chains of length n.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =25a(5) =135a(6) =913a(7) =7499a(8) =73191a(9) =833597a(10) =10917343a(11) =162402263a(12) =2715430931a(13) =50576761471

External references