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, 0), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.
A150242
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, 0), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =83a(5) =333a(6) =1381a(7) =5825a(8) =25211a(9) =110375a(10) =489231a(11) =2193431a(12) =9902749a(13) =45080215a(14) =206453882a(15) =950527781a(16) =4399269168a(17) =20442141063a(18) =95371321258a(19) =446489207904
External references
- oeis: A150242