Number of orbits of length n under the map whose periodic points are counted by A000670.

A060223

Number of orbits of length n under the map whose periodic points are counted by A000670.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =4a(4) =18a(5) =108a(6) =778a(7) =6756a(8) =68220a(9) =787472a(10) =10224702a(11) =147512052a(12) =2340963570a(13) =40527565260a(14) =760095923082

External references