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, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150014
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, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =18a(4) =66a(5) =234a(6) =931a(7) =3768a(8) =14868a(9) =62079a(10) =262221a(11) =1088156a(12) =4673851a(13) =20235559a(14) =86466939a(15) =378333205a(16) =1664920163a(17) =7252032306a(18) =32147861808a(19) =143128870572a(20) =631965293765
External references
- oeis: A150014