507549domain: NAppears in sequencesNumber of quad-coverings of a set.at n=5A165435Number of (5*n) X 5 binary arrays with rows in nonincreasing order and n ones in every column.at n=3A188389T(n,k) = number of (n*k) X k binary arrays with rows in nonincreasing order and n ones in every column.at n=31A188392