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, -1), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
A150305
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, -1), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =82a(5) =295a(6) =1243a(7) =4901a(8) =21385a(9) =88710a(10) =397079a(11) =1707910a(12) =7780507a(13) =34290382a(14) =158173416a(15) =710102360a(16) =3308443318a(17) =15064526545a(18) =70723706536a(19) =325617249711
External references
- oeis: A150305