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), (1, 0, -1), (1, 0, 0), (1, 1, 0)}.
A150451
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), (1, 0, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =104a(5) =418a(6) =1926a(7) =8362a(8) =39639a(9) =179449a(10) =864607a(11) =4017001a(12) =19549917a(13) =92409184a(14) =452737250a(15) =2165952708a(16) =10660736477a(17) =51450505184a(18) =254081698922
External references
- oeis: A150451