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, 0, 0), (0, 1, 1), (1, 0, -1), (1, 1, 0)}.
A150543
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, 0, 0), (0, 1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =103a(5) =432a(6) =1858a(7) =8189a(8) =36689a(9) =166642a(10) =765147a(11) =3543811a(12) =16535520a(13) =77630619a(14) =366395694a(15) =1737136637a(16) =8268646493a(17) =39494682800a(18) =189220899321a(19) =909028224403
External references
- oeis: A150543