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, 0, 0), (0, -1, 1), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.
A149362
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, 0, 0), (0, -1, 1), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =44a(5) =160a(6) =630a(7) =2505a(8) =10274a(9) =42813a(10) =181411a(11) =778323a(12) =3376953a(13) =14792252a(14) =65335900a(15) =290694175a(16) =1301823805a(17) =5863740425a(18) =26550162371a(19) =120780915859a(20) =551812209781
External references
- oeis: A149362