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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149384
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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =48a(5) =178a(6) =754a(7) =3038a(8) =13256a(9) =55906a(10) =248271a(11) =1076925a(12) =4840280a(13) =21389969a(14) =96984712a(15) =434253552a(16) =1982076992a(17) =8961513922a(18) =41116947235a(19) =187290133997a(20) =862948817693
External references
- oeis: A149384