[seqfan] Re: More fractal trees - and erasures
alexandre wajnberg.
alexandre.wajnberg at skynet.be
Sun Jan 4 14:41:39 CET 2015
Magique! :-D
Alexandre ♪
0476329810
De : Eric Angelini <Eric.Angelini at kntv.be>
Date : Sun, 4 Jan 2015 13:00:24 +0100
À : Sequence Discussion list <seqfan at list.seqfan.eu>
Objet : More fractal trees - and erasures
>
> 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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