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, 0), (1, 0, -1), (1, 1, 0)}.
A149284
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, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =44a(5) =155a(6) =647a(7) =2524a(8) =10851a(9) =44688a(10) =196029a(11) =834632a(12) =3713663a(13) =16168470a(14) =72696835a(15) =321575149a(16) =1457430579a(17) =6523572929a(18) =29751626175a(19) =134384963549a(20) =615987292496
External references
- oeis: A149284