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, -1, 1), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}.
A148194
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, -1, 1), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =32a(6) =111a(7) =339a(8) =1270a(9) =4228a(10) =16660a(11) =58812a(12) =239932a(13) =883852a(14) =3698244a(15) =14070761a(16) =60020868a(17) =234232378a(18) =1014341312a(19) =4040258419a(20) =17709836885a(21) =71738276020a(22) =317595021922
External references
- oeis: A148194