194952domain: NAppears in sequencesPeriod of the continued fraction for sqrt(2^(2n+1)).at n=18A059927Number of 7-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=11A187590Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=8A207114