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), (-1, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150177
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), (-1, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =78a(5) =288a(6) =1220a(7) =4840a(8) =21364a(9) =87936a(10) =398228a(11) =1682880a(12) =7759528a(13) =33369292a(14) =155811592a(15) =679381856a(16) =3203272984a(17) =14110245460a(18) =67023556416a(19) =297748804696
External references
- oeis: A150177