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, 0), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149749
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, 0), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =81a(5) =317a(6) =1537a(7) =6553a(8) =32093a(9) =143493a(10) =706865a(11) =3253045a(12) =16084801a(13) =75439549a(14) =373966353a(15) =1777282613a(16) =8826387409a(17) =42353608637a(18) =210621679933
External references
- oeis: A149749