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), (0, 0, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
A151197
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), (0, 0, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =52a(4) =238a(5) =1115a(6) =5313a(7) =25582a(8) =124147a(9) =605854a(10) =2969417a(11) =14601804a(12) =71990585a(13) =355671293a(14) =1760174880a(15) =8722964916a(16) =43278373590a(17) =214928743357
External references
- oeis: A151197