1155152

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 order-preserving partial functions f:{1,...,n}->{1,...,n}.at n=7A111903
• Number of regions in a "frame" of size n X n (see Comments for definition).at n=35A331776