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, 0, 0), (0, -1, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149457
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, 0, 0), (0, -1, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =50a(5) =197a(6) =817a(7) =3449a(8) =15026a(9) =66258a(10) =296866a(11) =1344971a(12) =6152390a(13) =28369819a(14) =131750885a(15) =615462749a(16) =2890281896a(17) =13635305645a(18) =64586737048a(19) =307031508266
External references
- oeis: A149457