Diagonal of square array A081297.

A081300

Diagonal of square array A081297.

Terms

    a(0) =1a(1) =5a(2) =55a(3) =481a(4) =10501a(5) =117181a(6) =3879331a(7) =52751105a(8) =2351234953a(9) =37766866501

External references