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, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150278
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, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =89a(5) =356a(6) =1488a(7) =6314a(8) =27245a(9) =118980a(10) =524095a(11) =2329881a(12) =10420569a(13) =46855042a(14) =211754434a(15) =960734442a(16) =4374585435a(17) =19982883368a(18) =91529713105a(19) =420306854683
External references
- oeis: A150278