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, 1, 0), (1, -1, 1), (1, 1, 0)}.
A149162
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, 1, 0), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =40a(5) =115a(6) =531a(7) =1707a(8) =8052a(9) =27731a(10) =132499a(11) =477673a(12) =2302126a(13) =8577767a(14) =41595124a(15) =158897465a(16) =774062896a(17) =3015427933a(18) =14741580123a(19) =58341229353a(20) =286014447954
External references
- oeis: A149162