Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1,-1), (-1,1), (-1,0), (0,1), (1,0), (1,1)}.
A151322
Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1,-1), (-1,1), (-1,0), (0,1), (1,0), (1,1)}.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =65a(4) =330a(5) =1683a(6) =8874a(7) =47088a(8) =253802a(9) =1375939a(10) =7524651a(11) =41346061a(12) =228447273a(13) =1267005772a(14) =7054307476a(15) =39394861448a(16) =220641191059
External references
- oeis: A151322