Duplicate of A035029.

A049607

Duplicate of A035029.

Terms

    a(0) =0a(1) =1a(2) =5a(3) =26a(4) =138a(5) =743a(6) =4043a(7) =22180a(8) =122468a(9) =679757a(10) =3789297a(11) =21199998a(12) =118973550

External references