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), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A149666
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), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =61a(5) =249a(6) =1029a(7) =4393a(8) =18877a(9) =82593a(10) =368597a(11) =1642809a(12) =7460525a(13) =33873153a(14) =155405773a(15) =716194809a(16) =3311534229a(17) =15417851985a(18) =71875081357a(19) =336818380025
External references
- oeis: A149666