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, 0, 1), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
A150143
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, 0, 1), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =73a(5) =282a(6) =1138a(7) =4740a(8) =20238a(9) =88143a(10) =390061a(11) =1749068a(12) =7929891a(13) =36288683a(14) =167390945a(15) =777445430a(16) =3632416696a(17) =17060267774a(18) =80495119152a(19) =381346095317
External references
- oeis: A150143