303664domain: NAppears in sequencesNumber of 5 X n binary matrices with 3 unit columns up to row and column permutations.at n=6A057972Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,0,2,4 for x=0,1,2,3,4.at n=9A196850