238604domain: NAppears in sequencesa(n) = a(n-1) + a(n-2) + 1, with a(0)=3, a(1)=10.at n=22A022409Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (-1, 0), (-1, 1), (0, 1), (1, 0), (1, 1)}.at n=9A151470