a(n) = (n+1) * (2^n + 1)^n.A326011a(n) = (n+1) * (2^n + 1)^n.Terms a(0) =1a(1) =6a(2) =75a(3) =2916a(4) =417605a(5) =234812358a(6) =527932234375External referencesoeis: A326011