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, 0, -1), (0, 1, -1), (1, 1, 1)}.
A149663
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, 0, -1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =61a(5) =241a(6) =1013a(7) =4073a(8) =17069a(9) =73505a(10) =316133a(11) =1361337a(12) =5980189a(13) =26406801a(14) =116548949a(15) =518274729a(16) =2322720077a(17) =10418420609a(18) =46852187525a(19) =211863806873a(20) =960661273085
External references
- oeis: A149663