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), (0, 0, 1), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
A150875
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), (0, 0, 1), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =147a(5) =670a(6) =3125a(7) =14776a(8) =70629a(9) =340238a(10) =1649025a(11) =8030675a(12) =39258660a(13) =192515117a(14) =946458827a(15) =4662928259a(16) =23013738604a(17) =113754565960a(18) =562998849876
External references
- oeis: A150875