[seqfan] Decreasing runs - a permutation of the naturals

Eric Angelini Eric.Angelini at kntv.be
Sun Aug 22 23:09:59 CEST 2010


As in my previous post (increasing and self-describing runs), here is  
another
permutation of the natural numbers:

T=2,1,3,6,5,4,12,11,10,9,8,7,17,16,15,14,13,21,20,19,18,33,32,...

Those are decreasing runs, for a change:
2,1,
3,
6,5,4,
12,11,10,9,8,7,
17,16,15,14,13,
21,20,19,18,
...

Size of the said runs:
2,
1,
3,
6,
5,
4,
...

which re-forms T.

Best,
E.





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