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, 1, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
A149449
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, 1, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =48a(5) =186a(6) =754a(7) =3101a(8) =13081a(9) =55918a(10) =241842a(11) =1056729a(12) =4653512a(13) =20636905a(14) =92045421a(15) =412664764a(16) =1858189426a(17) =8400280703a(18) =38106109901a(19) =173399399510a(20) =791243931982
External references
- oeis: A149449