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, -1, 1), (-1, 0, -1), (1, -1, 0), (1, 1, 0)}.
A149084
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, -1, 1), (-1, 0, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =30a(5) =69a(6) =287a(7) =803a(8) =3184a(9) =10223a(10) =39365a(11) =137077a(12) =526038a(13) =1908173a(14) =7410214a(15) =27444031a(16) =108163520a(17) =406581453a(18) =1620661401a(19) =6178281377a(20) =24812970848a(21) =95829276553a(22) =387089467618
External references
- oeis: A149084