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, -1), (-1, 0, 1), (0, 1, 0), (1, -1, 0)}.
A148126
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, -1), (-1, 0, 1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =26a(6) =75a(7) =216a(8) =656a(9) =1950a(10) =6394a(11) =20193a(12) =66477a(13) =219595a(14) =751938a(15) =2514386a(16) =8774087a(17) =30337633a(18) =106836045a(19) =374070118a(20) =1345890867a(21) =4774149535a(22) =17280927737a(23) =62313709836a(24) =227984366294a(25) =827225060479
External references
- oeis: A148126