a(n) = Sum_{d|n} d^d * sopf(d).

A343274

a(n) = Sum_{d|n} d^d * sopf(d).

Terms

    a(0) =0a(1) =8a(2) =81a(3) =520a(4) =15625a(5) =233369a(6) =5764801a(7) =33554952a(8) =1162261548a(9) =70000015633

External references