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, 0, 0), (-1, 0, 1), (0, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149779
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, 0, 0), (-1, 0, 1), (0, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =79a(5) =345a(6) =1519a(7) =6753a(8) =31275a(9) =144213a(10) =670297a(11) =3163775a(12) =14936953a(13) =70792149a(14) =338585227a(15) =1619921411a(16) =7770795003a(17) =37481336509a(18) =180882640119a(19) =874507511059
External references
- oeis: A149779