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, 0), (-1, 1, 1), (1, 0, 0)}.
A148551
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, 0), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =21a(5) =44a(6) =189a(7) =433a(8) =1975a(9) =4838a(10) =22191a(11) =56451a(12) =265204a(13) =696955a(14) =3285575a(15) =8820421a(16) =42076429a(17) =115141696a(18) =550620015a(19) =1527687361a(20) =7355385064a(21) =20666807843a(22) =99695173095a(23) =282849216712
External references
- oeis: A148551