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, 0, 1), (1, 1, 0), (1, 1, 1)}.
A151219
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, 0, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =55a(4) =265a(5) =1205a(6) =5941a(7) =27961a(8) =138745a(9) =665103a(10) =3310317a(11) =16041609a(12) =79986407a(13) =390348973a(14) =1948432333a(15) =9555608427a(16) =47726348731a(17) =234904326795
External references
- oeis: A151219