75567domain: NAppears in sequencesa(n) = a(n-1) + a(n-2) + n^2 for n >= 3, a(1)=2, and a(2)=5.at n=17A179992Number of 9-step S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=8A187383