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, 1, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
A149048
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, 1, 0), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =39a(5) =144a(6) =615a(7) =2488a(8) =11080a(9) =47401a(10) =216326a(11) =958515a(12) =4449062a(13) =20178691a(14) =94826467a(15) =437279311a(16) =2074031303a(17) =9683449511a(18) =46256188985a(19) =218045307657
External references
- oeis: A149048