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), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
A150869
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), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =145a(5) =657a(6) =3035a(7) =14263a(8) =67702a(9) =324284a(10) =1563154a(11) =7575254a(12) =36866647a(13) =180042765a(14) =881833295a(15) =4329580493a(16) =21301350732a(17) =104985692759a(18) =518220023836
External references
- oeis: A150869