[seqfan] More fractal trees - and erasures

Eric Angelini Eric.Angelini at kntv.be
Sun Jan 4 13:00:24 CET 2015


Hello SeqFans,

Build this easy tree:
          0
        1,0,2
      3,1,0,2,4
    5,3,1,0,2,4,6
  7,5,3,1,0,2,4,6,8
9,7,5,3,1,0,2,4,6,8,10
...
Get S by concatenating the top row to
the next one, then to the next one, then
to the next one, etc.

S=0,1,0,2,3,1,0,2,4,5,3,1,0,2,4,6,7,5,3,1,0,2,4,6,8,9,7,5,...

If you erase in S all pairs of consecutive
integers, you'll get back S.

Best,
É.



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