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, 0), (-1, -1, 1), (-1, 0, 0), (1, 1, -1), (1, 1, 0)}.
A149105
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, 0), (-1, -1, 1), (-1, 0, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =34a(5) =87a(6) =383a(7) =1117a(8) =5028a(9) =15912a(10) =72724a(11) =243439a(12) =1124981a(13) =3923900a(14) =18286061a(15) =65823449a(16) =308779801a(17) =1139618569a(18) =5374534823a(19) =20243260284a(20) =95889093762a(21) =367320084707
External references
- oeis: A149105