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, 0), (0, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
A150108
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, 0), (0, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =69a(5) =260a(6) =1044a(7) =4291a(8) =18222a(9) =78661a(10) =346083a(11) =1541366a(12) =6949629a(13) =31624846a(14) =145147357a(15) =670888223a(16) =3120523813a(17) =14593863806a(18) =68582232449a(19) =323676827232
External references
- oeis: A150108