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, 1), (-1, 0, 0), (-1, 1, 1), (1, -1, -1), (1, 1, 0)}.
A149111
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, 1), (-1, 0, 0), (-1, 1, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =36a(5) =100a(6) =458a(7) =1462a(8) =6809a(9) =23521a(10) =111180a(11) =405288a(12) =1935161a(13) =7330542a(14) =35252989a(15) =137422833a(16) =664576216a(17) =2649175259a(18) =12867856516a(19) =52224563411a(20) =254550418677
External references
- oeis: A149111