Last entry in n-th row of triangle defined in A059226.

A059227

Last entry in n-th row of triangle defined in A059226.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =18a(4) =94a(5) =544a(6) =3370a(7) =21878a(8) =146924a(9) =1012222a(10) =7114218a(11) =50808592a(12) =367669254a(13) =2689974234a(14) =19864822564a(15) =147875395930

External references