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, -1)}.
A150555
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, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =105a(5) =444a(6) =1933a(7) =8594a(8) =38837a(9) =177733a(10) =821578a(11) =3829041a(12) =17966799a(13) =84784169a(14) =402025974a(15) =1914229705a(16) =9147338010a(17) =43848995372a(18) =210778380404
External references
- oeis: A150555