219296domain: NAppears in sequencesExpansion of exp ( - x - (1/2)*x^2 - (1/6)*x^3).at n=13A014775Weight distribution of [89,45,17] binary quadratic-residue (or QR) code.at n=18A091536Number of 4-step knight's tours on an (n+2) X (n+2) board summed over all starting positions.at n=24A186853