The work performed by a function f:{1,...,n} -> {1,...,n} is defined to be work(f) = Sum_{i=1..n} |i - f(i)|; a(n) is equal to sum(work(f)) where the sum is over all functions f:{1,...,n}->{1,...,n}.

A111868

The work performed by a function f:{1,...,n} -> {1,...,n} is defined to be work(f) = Sum_{i=1..n} |i - f(i)|; a(n) is equal to sum(work(f)) where the sum is over all functions f:{1,...,n}->{1,...,n}.