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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A149464
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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =52a(5) =209a(6) =898a(7) =3898a(8) =17383a(9) =78335a(10) =358867a(11) =1654507a(12) =7705474a(13) =36071044a(14) =170031345a(15) =804606129a(16) =3825822908a(17) =18249491754a(18) =87362378973a(19) =419284812428
External references
- oeis: A149464