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), (0, 0, -1), (1, -1, -1), (1, 1, 0)}.
A148686
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), (0, 0, -1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =22a(5) =67a(6) =228a(7) =775a(8) =2787a(9) =10096a(10) =37692a(11) =142300a(12) =546739a(13) =2124319a(14) =8349915a(15) =33135509a(16) =132647446a(17) =535088379a(18) =2174051788a(19) =8887400681a(20) =36550977240a(21) =151088635064a(22) =627703523526
External references
- oeis: A148686