Number 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), (0,1), (1,-1), (1,0), (1,1)}.
A151496
Number 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), (0,1), (1,-1), (1,0), (1,1)}.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =27a(4) =160a(5) =870a(6) =5345a(7) =32865a(8) =211512a(9) =1380372a(10) =9214548a(11) =62327958a(12) =427516056a(13) =2963478804a(14) =20745401391a(15) =146427786219
External references
- oeis: A151496