5798797620

Appears in sequences

• The work performed by a partial function f:{1,...,n}->{1,...,n} is defined to be work(f)=sum(|i-f(i)|,i in dom(f)); a(n) is equal to sum(work(f)) where the sum is over all injective partial functions f:{1,...,n}->{1,...,n}.at n=9A111874