Final entry in n-th row of triangle in A080524.

A080526

Final entry in n-th row of triangle in A080524.

Terms

    a(0) =1a(1) =3a(2) =10a(3) =67a(4) =627a(5) =7781a(6) =117652a(7) =2097159a(8) =43046725a(9) =1000000009a(10) =25937424606a(11) =743008370699

External references