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, 1, -1), (0, 1, 1), (1, 0, 0)}.
A149852
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, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =14a(4) =46a(5) =154a(6) =578a(7) =2168a(8) =8182a(9) =31532a(10) =125070a(11) =493576a(12) =1967344a(13) =7989243a(14) =32449575a(15) =132284139a(16) =544422926a(17) =2252015827a(18) =9319866551a(19) =38789146879a(20) =162226732758a(21) =679162610573
External references
- oeis: A149852