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, 0), (0, -1, 1), (1, 1, 0)}.
A149118
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, 0), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =32a(5) =103a(6) =345a(7) =1275a(8) =4410a(9) =16741a(10) =61731a(11) =233495a(12) =902378a(13) =3437487a(14) =13553036a(15) =52676569a(16) =208717276a(17) =828362597a(18) =3294044819a(19) =13255061489a(20) =53113955276a(21) =215179562527a(22) =870783523200
External references
- oeis: A149118