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, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
A150249
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, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =85a(5) =336a(6) =1372a(7) =5740a(8) =24425a(9) =105261a(10) =458182a(11) =2011788a(12) =8899353a(13) =39614961a(14) =177280748a(15) =797006118a(16) =3597773569a(17) =16299874968a(18) =74086717516a(19) =337716465552
External references
- oeis: A150249