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, 0), (1, 0, 1), (1, 1, 0)}.
A150341
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, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =89a(5) =334a(6) =1361a(7) =5438a(8) =22865a(9) =94784a(10) =407045a(11) =1728913a(12) =7538835a(13) =32581158a(14) =143720183a(15) =629266387a(16) =2801110393a(17) =12389597024a(18) =55557069245a(19) =247746634259
External references
- oeis: A150341