a(n) = (n+1)^n/(n+2) - (-1)^n/(n+2).

A083062

a(n) = (n+1)^n/(n+2) - (-1)^n/(n+2).

Terms

    a(0) =0a(1) =1a(2) =2a(3) =13a(4) =104a(5) =1111a(6) =14706a(7) =233017a(8) =4304672a(9) =90909091a(10) =2161452050a(11) =57154490053

External references