513616domain: NAppears in sequencesNumber of aperiodic tilings of an n X 1 rectangle by tiles of dimension 1 X 1 and 2 X 1.at n=27A225202Number of nX7 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=14A281468