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), (0, 1), (1, -1), (1, 0), (1, 1)}.
A151328
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), (0, 1), (1, -1), (1, 0), (1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =16a(3) =84a(4) =484a(5) =2843a(6) =17193a(7) =105553a(8) =657177a(9) =4133074a(10) =26217040a(11) =167455754a(12) =1075896508a(13) =6947158172a(14) =45052303360a(15) =293263303568
External references
- oeis: A151328