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, 0, -1), (-1, 1, 1), (0, 0, 1), (1, 0, 0)}.
A149932
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, 0, -1), (-1, 1, 1), (0, 0, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =49a(5) =165a(6) =584a(7) =2134a(8) =7902a(9) =29892a(10) =114882a(11) =445389a(12) =1746830a(13) =6917227a(14) =27555548a(15) =110577812a(16) =446571878a(17) =1811419809a(18) =7384904017a(19) =30243833998a(20) =124275887253a(21) =512565470691
External references
- oeis: A149932