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), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
A150880
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), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =148a(5) =681a(6) =3207a(7) =15304a(8) =73793a(9) =358363a(10) =1749904a(11) =8580148a(12) =42207338a(13) =208156879a(14) =1028695705a(15) =5092223056a(16) =25241971267a(17) =125265601296a(18) =622231878859
External references
- oeis: A150880