169215domain: NAppears in sequencesa(n) = round( Gamma(n+3/4)/Gamma(3/4) ).at n=9A020041Ceiling of Gamma(n+3/4)/Gamma(3/4).at n=9A020131Free chiral polyominoes with n squares, having 90-degree rotational symmetry about the center of a square of the underlying square matrix.at n=47A351142