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, 0), (-1, 1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148299
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, 0), (-1, 1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =36a(6) =116a(7) =368a(8) =1232a(9) =4246a(10) =14725a(11) =52621a(12) =191368a(13) =702694a(14) =2623720a(15) =9865742a(16) =37418929a(17) =143465704a(18) =553471257a(19) =2151274776a(20) =8414169759a(21) =33058543852a(22) =130629116341a(23) =518625570150
External references
- oeis: A148299