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, 1, -1), (1, 1, 1)}.
A149780
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, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =81a(5) =347a(6) =1537a(7) =6915a(8) =31745a(9) =146847a(10) =686295a(11) =3227131a(12) =15264785a(13) =72557201a(14) =346320677a(15) =1658794109a(16) =7970395611a(17) =38398699959a(18) =185435551327a(19) =897396788319
External references
- oeis: A149780