2816118529domain: NAppears in sequencesNumber of (n+2)X4 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.at n=6A184567Number of (n+2)X9 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.at n=1A184572