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), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
A150304
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), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =82a(5) =295a(6) =1224a(7) =4863a(8) =20642a(9) =86712a(10) =375745a(11) =1636141a(12) =7224851a(13) =32128224a(14) =144099952a(15) =650284953a(16) =2955045582a(17) =13489230967a(18) =61907970108a(19) =285216533074
External references
- oeis: A150304