50030domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 9.at n=52A136891Expansion of Product_{k>=1} (1 + x^(5*k-4))^(5*k-4).at n=50A285338Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3 or 7 king-move adjacent elements, with upper left element zero.at n=7A304772