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, 0, 1), (1, -1, -1), (1, -1, 1), (1, 1, 0)}.
A149209
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, 0, 1), (1, -1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =40a(5) =134a(6) =527a(7) =1950a(8) =7904a(9) =30491a(10) =125199a(11) =498445a(12) =2067864a(13) =8381254a(14) =35053759a(15) =144098563a(16) =606147761a(17) =2516740364a(18) =10640646802a(19) =44529824218a(20) =189010047669a(21) =795948814046
External references
- oeis: A149209