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, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150828
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, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =146a(5) =641a(6) =3118a(7) =14378a(8) =70835a(9) =335145a(10) =1661438a(11) =7981402a(12) =39699537a(13) =192584137a(14) =959754642a(15) =4686827981a(16) =23384008468a(17) =114732996836a(18) =572848499697
External references
- oeis: A150828