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), (0, 1, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
A150871
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), (0, 1, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =145a(5) =660a(6) =3071a(7) =14512a(8) =69325a(9) =333898a(10) =1618263a(11) =7881459a(12) =38534551a(13) =188997127a(14) =929341022a(15) =4579498427a(16) =22606465741a(17) =111763160068a(18) =553246380277
External references
- oeis: A150871