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), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150450
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), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =103a(5) =424a(6) =1928a(7) =8485a(8) =39919a(9) =182674a(10) =875189a(11) =4099917a(12) =19871014a(13) =94540075a(14) =461747592a(15) =2220650729a(16) =10904091721a(17) =52849791555a(18) =260512174353
External references
- oeis: A150450