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, 0), (0, 1), (1, -1), (1, 1)}.
A151301
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, 0), (0, 1), (1, -1), (1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =29a(4) =124a(5) =520a(6) =2299a(7) =10185a(8) =46139a(9) =210288a(10) =969337a(11) =4493757a(12) =20975812a(13) =98367797a(14) =463470713a(15) =2191776623a(16) =10401020754a(17) =49503229100a(18) =236245016604
External references
- oeis: A151301