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), (1, 0, -1), (1, 1, 0)}.
A148568
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), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =19a(5) =48a(6) =163a(7) =458a(8) =1623a(9) =4873a(10) =17694a(11) =55688a(12) =205205a(13) =667727a(14) =2489066a(15) =8303744a(16) =31230747a(17) =106263877a(18) =402383332a(19) =1391009865a(20) =5296310843a(21) =18547893105a(22) =70941590289a(23) =251157988654a(24) =964231083001
External references
- oeis: A148568