35558domain: NAppears in sequencesNumbers k such that 255*2^k+1 is prime.at n=42A032504Expansion of (1-sqrt(1-(2*(1-sqrt(1-4*x^2)))/x))/2.at n=11A242566Number of n X 2 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1s.at n=12A295091