(2n-1)^(2n+1) + (2n+1)^(2n-1).A154682(2n-1)^(2n+1) + (2n+1)^(2n-1).Terms a(0) =0a(1) =4a(2) =368a(3) =94932a(4) =45136576a(5) =33739007300External referencesoeis: A154682