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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
A148389
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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =51a(6) =175a(7) =603a(8) =2179a(9) =7966a(10) =30115a(11) =115175a(12) =447599a(13) =1754566a(14) =6960211a(15) =27838776a(16) =112401002a(17) =457156790a(18) =1872092533a(19) =7709515518a(20) =31925277406a(21) =132858964434a(22) =555535209096
External references
- oeis: A148389