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, 0, 1), (1, -1, 0), (1, 0, -1), (1, 1, 0)}.
A150549
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, 0, 1), (1, -1, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =105a(5) =438a(6) =1883a(7) =8261a(8) =36829a(9) =166217a(10) =757759a(11) =3482883a(12) =16118980a(13) =75034272a(14) =351040611a(15) =1649438104a(16) =7779730832a(17) =36817013598a(18) =174754037184a(19) =831695343920
External references
- oeis: A150549