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), (-1, 1, 1), (0, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149777
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), (-1, 1, 1), (0, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =79a(5) =337a(6) =1487a(7) =6667a(8) =30477a(9) =140415a(10) =654037a(11) =3065781a(12) =14464051a(13) =68594987a(14) =326693571a(15) =1561823519a(16) =7491695533a(17) =36035788369a(18) =173781740083a(19) =839928505357
External references
- oeis: A149777