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), (1, -1, 1), (1, 0, -1), (1, 0, 0)}.
A148911
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), (1, -1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =32a(5) =109a(6) =473a(7) =1825a(8) =8230a(9) =34068a(10) =157238a(11) =679798a(12) =3185677a(13) =14179452a(14) =67157892a(15) =305141027a(16) =1456515990a(17) =6719210749a(18) =32262493470a(19) =150566769960a(20) =726300897107
External references
- oeis: A148911