a(n) = Sum_{d|n} d^(n^2/d).A308593a(n) = Sum_{d|n} d^(n^2/d).Terms a(0) =1a(1) =5a(2) =28a(3) =513a(4) =3126a(5) =840242a(6) =823544a(7) =8606711809a(10) =285311670612External referencesoeis: A308593