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), (1, -1, 0), (1, 0, 0)}.
A148111
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), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =29a(6) =81a(7) =254a(8) =808a(9) =2662a(10) =9199a(11) =31691a(12) =113292a(13) =411434a(14) =1508096a(15) =5655391a(16) =21312822a(17) =81456715a(18) =315068989a(19) =1224636405a(20) =4817113618a(21) =19064234579a(22) =75937817010a(23) =304996020184
External references
- oeis: A148111