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, 1), (0, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A150579
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, 1), (0, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =109a(5) =461a(6) =2049a(7) =9172a(8) =42049a(9) =193861a(10) =905660a(11) =4250001a(12) =20105450a(13) =95455550a(14) =455607771a(15) =2180924344a(16) =10478502682a(17) =50463883763a(18) =243693092446
External references
- oeis: A150579