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), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.
A150146
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), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =73a(5) =285a(6) =1161a(7) =4862a(8) =20771a(9) =90353a(10) =399091a(11) =1784543a(12) =8055832a(13) =36659569a(14) =168035062a(15) =775172993a(16) =3595679620a(17) =16757243082a(18) =78421752518a(19) =368401565131
External references
- oeis: A150146