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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
A148085
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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =27a(6) =72a(7) =227a(8) =708a(9) =2223a(10) =7676a(11) =25430a(12) =89027a(13) =315152a(14) =1111571a(15) =4083639a(16) =14835745a(17) =54972549a(18) =206172592a(19) =771640657a(20) =2944008745a(21) =11222552195a(22) =43125977024a(23) =167242399629a(24) =648464893456
External references
- oeis: A148085