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, -1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149024
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, -1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =38a(5) =134a(6) =584a(7) =2309a(8) =10312a(9) =43552a(10) =198091a(11) =867511a(12) =4004962a(13) =17954426a(14) =83845509a(15) =382281459a(16) =1800809791a(17) =8315906216a(18) =39437787069a(19) =183934361353a(20) =876998515467
External references
- oeis: A149024