a(n) = 2^n*(2^n + n)^(n-1).A136524a(n) = 2^n*(2^n + n)^(n-1).Terms a(0) =1a(1) =2a(2) =24a(3) =968a(4) =128000a(5) =59973152a(6) =107564800000External referencesoeis: A136524