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, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}.
A149652
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, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =73a(5) =253a(6) =1249a(7) =4715a(8) =23383a(9) =92777a(10) =461363a(11) =1889779a(12) =9412703a(13) =39414289a(14) =196524667a(15) =836368379a(16) =4173239663a(17) =17983252335a(18) =89776734151a(19) =390717706879
External references
- oeis: A149652