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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
A149789
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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =83a(5) =359a(6) =1621a(7) =7397a(8) =34287a(9) =160329a(10) =756171a(11) =3587343a(12) =17109611a(13) =81943397a(14) =393873557a(15) =1898913021a(16) =9178998447a(17) =44469765073a(18) =215871925197
External references
- oeis: A149789