Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of 2 n steps taken from {(-1, -1), (-1, 0), (-1, 1), (1, 1)}.
A151383
Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of 2 n steps taken from {(-1, -1), (-1, 0), (-1, 1), (1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =18a(3) =135a(4) =1134a(5) =10206a(6) =96228a(7) =938223a(8) =9382230a(9) =95698746a(10) =991787004a(11) =10413763542a(12) =110546105292
External references
- oeis: A151383