1951744domain: NAppears in sequencesNumber of 5-step knight's tours on an (n+2) X (n+2) board summed over all starting positions.at n=28A186854Number of (n+1)X(5+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=22A237634