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, 1), (-1, 1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148169
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, 1), (-1, 1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =103a(7) =342a(8) =1223a(9) =4392a(10) =16506a(11) =62556a(12) =244133a(13) =960293a(14) =3851560a(15) =15555730a(16) =63698508a(17) =262461123a(18) =1092521898a(19) =4572692026a(20) =19288640555a(21) =81754788980a(22) =348654622331
External references
- oeis: A148169