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, 0), (0, 0, 1), (0, 1, -1), (1, 1, 0)}.
A150539
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, 0), (0, 0, 1), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =103a(5) =426a(6) =1817a(7) =7905a(8) =34999a(9) =156978a(10) =711572a(11) =3254200a(12) =14992984a(13) =69508490a(14) =324005487a(15) =1517421717a(16) =7135832181a(17) =33679784580a(18) =159477986279a(19) =757336398740
External references
- oeis: A150539