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), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150716
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), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =112a(5) =424a(6) =1696a(7) =6608a(8) =26432a(9) =104272a(10) =417088a(11) =1655376a(12) =6621504a(13) =26364496a(14) =105457984a(15) =420652976a(16) =1682611904a(17) =6718702608a(18) =26874810432a(19) =107379799984a(20) =429519199936
External references
- oeis: A150716