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), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150083
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), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =64a(5) =231a(6) =870a(7) =3381a(8) =13486a(9) =54572a(10) =224125a(11) =933929a(12) =3936544a(13) =16765384a(14) =71980646a(15) =311017381a(16) =1352436222a(17) =5916084672a(18) =26018810746a(19) =114980517626a(20) =510144652268
External references
- oeis: A150083