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, -1, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
A150500
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, -1, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =101a(5) =416a(6) =1787a(7) =7792a(8) =34645a(9) =155722a(10) =707795a(11) =3242515a(12) =14963665a(13) =69458000a(14) =324102287a(15) =1519028843a(16) =7147771981a(17) =33750528146a(18) =159860887355a(19) =759295147045
External references
- oeis: A150500