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), (-1, 0, 1), (1, 0, 1), (1, 1, -1)}.
A149214
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), (-1, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =42a(5) =135a(6) =587a(7) =2117a(8) =9440a(9) =36222a(10) =164694a(11) =656791a(12) =3031172a(13) =12413214a(14) =57948607a(15) =241968630a(16) =1139741739a(17) =4830463288a(18) =22915599452a(19) =98276507899a(20) =468915380663
External references
- oeis: A149214