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, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 0)}.
A148034
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, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =53a(7) =126a(8) =417a(9) =1085a(10) =3802a(11) =10606a(12) =38490a(13) =112222a(14) =418270a(15) =1269365a(16) =4841684a(17) =15139700a(18) =58700203a(19) =188206735a(20) =740895946a(21) =2427550418a(22) =9670669705a(23) =32250337866a(24) =129828603088a(25) =439937208900
External references
- oeis: A148034