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, 0), (-1, 1, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
A148483
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, 0), (-1, 1, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =20a(5) =75a(6) =294a(7) =1185a(8) =4948a(9) =21134a(10) =92195a(11) =408762a(12) =1835534a(13) =8332934a(14) =38172676a(15) =176241883a(16) =819216675a(17) =3830325107a(18) =18001210955a(19) =84982319068a(20) =402802744351
External references
- oeis: A148483