172408domain: NAppears in sequencesNumber of (n+1)X5 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=18A205068Expansion of Product_{k>=2} (1 + x^Fibonacci(k))^Fibonacci(k).at n=44A291650