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, 0), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
A149049
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, 0), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =39a(5) =145a(6) =630a(7) =2593a(8) =11591a(9) =50017a(10) =229816a(11) =1027680a(12) =4787417a(13) =21844486a(14) =103089050a(15) =478192777a(16) =2274130170a(17) =10665707770a(18) =51086135767a(19) =241825054742
External references
- oeis: A149049