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), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149809
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), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =93a(5) =401a(6) =1983a(7) =9091a(8) =45161a(9) =213119a(10) =1061479a(11) =5093533a(12) =25406273a(13) =123181471a(14) =614950881a(15) =3002237019a(16) =14995780171a(17) =73566098813a(18) =367575895361
External references
- oeis: A149809