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, -1), (-1, 0, 0), (0, 1, 1), (1, -1, 1), (1, 1, 0)}.
A150571
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, -1), (-1, 0, 0), (0, 1, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =453a(6) =1991a(7) =8790a(8) =39647a(9) =180294a(10) =830133a(11) =3845731a(12) =17942624a(13) =84128745a(14) =396273416a(15) =1873685843a(16) =8891491081a(17) =42325910206a(18) =202038233279a(19) =966747007053
External references
- oeis: A150571