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), (0, 0, 1), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
A151222
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), (0, 0, 1), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =57a(4) =265a(5) =1249a(6) =5985a(7) =28921a(8) =140769a(9) =688451a(10) =3380087a(11) =16643697a(12) =82146741a(13) =406201851a(14) =2011677275a(15) =9975162381a(16) =49514935929a(17) =245999398831
External references
- oeis: A151222