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, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150074
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, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =65a(5) =240a(6) =948a(7) =3773a(8) =15553a(9) =64941a(10) =276285a(11) =1186438a(12) =5153114a(13) =22564080a(14) =99564775a(15) =442029299a(16) =1973429457a(17) =8853309118a(18) =39889867084a(19) =180418112547a(20) =818813951764
External references
- oeis: A150074