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), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150040
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), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =17a(4) =65a(5) =229a(6) =908a(7) =3456a(8) =14481a(9) =58052a(10) =248380a(11) =1029739a(12) =4492664a(13) =19064581a(14) =84244806a(15) =363805603a(16) =1624096117a(17) =7108367313a(18) =31985383465a(19) =141495222325a(20) =640810214039
External references
- oeis: A150040