Number of orbits of length n under the map whose periodic points are counted by A061693.

A092239

Number of orbits of length n under the map whose periodic points are counted by A061693.

Terms

    a(0) =0a(1) =2a(2) =9a(3) =42a(4) =225a(5) =1260a(6) =7497a(7) =46176a(8) =293382a(9) =1908150a(10) =12655269a(11) =85287870a(12) =582628683a(13) =4026368514a(14) =28104231825a(15) =197884340160

External references