43622domain: NAppears in sequencesa(1) = 1, a(n+1) is the largest squarefree number <= n*a(n).at n=8A077001Number of (n+1)X6 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors.at n=14A205069