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), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149786
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), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =81a(5) =353a(6) =1573a(7) =7125a(8) =32859a(9) =152537a(10) =715729a(11) =3378225a(12) =16036255a(13) =76480131a(14) =366188831a(15) =1759087771a(16) =8475475949a(17) =40937117245a(18) =198172473761a(19) =961220787025
External references
- oeis: A149786