679536domain: NAppears in sequencesNumber of (n+2) X 3 binary arrays avoiding patterns 001 and 011 in rows and columns.at n=18A202093Number of (n+1)X(2+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.at n=19A250426a(n) = A259109(n)*A006331(n) - A259108(n)^2.at n=5A259318