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, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150807
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, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =133a(5) =586a(6) =2650a(7) =12189a(8) =56736a(9) =266741a(10) =1262802a(11) =6014765a(12) =28782488a(13) =138282827a(14) =666545461a(15) =3221898963a(16) =15611199126a(17) =75798945036a(18) =368705744764
External references
- oeis: A150807