Sum of n-th powers of divisors of 8.

Terms

a(0) =4a(1) =15a(2) =85a(3) =585a(4) =4369a(5) =33825a(6) =266305a(7) =2113665a(8) =16843009a(9) =134480385a(10) =1074791425a(11) =8594130945a(12) =68736258049a(13) =549822930945