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, 1, -1)}.
A148975
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, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =32a(5) =107a(6) =406a(7) =1543a(8) =6090a(9) =24146a(10) =98643a(11) =406416a(12) =1695798a(13) =7137445a(14) =30371510a(15) =130114585a(16) =561109001a(17) =2434945076a(18) =10628079754a(19) =46605896147a(20) =205271832088a(21) =907951122880
External references
- oeis: A148975