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, 0, 0), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150766
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, 0, 0), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =126a(5) =547a(6) =2394a(7) =10828a(8) =49083a(9) =225948a(10) =1047558a(11) =4885804a(12) =22948495a(13) =108183323a(14) =512429575a(15) =2435390112a(16) =11610184038a(17) =55510819254a(18) =266021930885
External references
- oeis: A150766