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, 0), (0, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150889
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, 0), (0, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =34a(4) =150a(5) =682a(6) =3174a(7) =14970a(8) =71340a(9) =342710a(10) =1656644a(11) =8046426a(12) =39237846a(13) =191962322a(14) =941663210a(15) =4629658186a(16) =22805288372a(17) =112519961104a(18) =555947186900
External references
- oeis: A150889