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, -1), (1, 1)}.
A151277
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, -1), (1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =19a(4) =92a(5) =380a(6) =1858a(7) =8531a(8) =42322a(9) =205486a(10) =1036242a(11) =5197028a(12) =26600656a(13) =136247450a(14) =706258300a(15) =3671453391a(16) =19233967034a(17) =101105026444a(18) =534364343102
External references
- oeis: A151277