Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (-1, 1, 0), (1, 0, -1), (1, 0, 1)}.
A149279
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (-1, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =44a(5) =133a(6) =585a(7) =2067a(8) =9140a(9) =33151a(10) =152215a(11) =588887a(12) =2707930a(13) =10600185a(14) =49739802a(15) =201846411a(16) =947313436a(17) =3868920739a(18) =18391118427a(19) =76883715861a(20) =365360718030
External references
- oeis: A149279