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), (0, 0, 1), (1, 0, -1)}.
A148578
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), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =51a(6) =182a(7) =549a(8) =2032a(9) =6864a(10) =25831a(11) =93757a(12) =357632a(13) =1360284a(14) =5277311a(15) =20696663a(16) =81799018a(17) =327234487a(18) =1316257630a(19) =5339902882a(20) =21808431653a(21) =89495933691a(22) =370048213371
External references
- oeis: A148578