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), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150194
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), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =79a(5) =303a(6) =1215a(7) =4987a(8) =20714a(9) =87388a(10) =373220a(11) =1606108a(12) =6966239a(13) =30432499a(14) =133645431a(15) =589776713a(16) =2614755682a(17) =11636407959a(18) =51961981179a(19) =232786535938
External references
- oeis: A150194