Second column of triangle A075502.

A075921

Second column of triangle A075502.

Terms

    a(0) =1a(1) =21a(2) =343a(3) =5145a(4) =74431a(5) =1058841a(6) =14941423a(7) =210003465a(8) =2945813311a(9) =41281739961a(10) =578226834703

External references