[seqfan] Re: seqs whose |differences| are 1,2,3,4,...

N. J. A. Sloane njas at research.att.com
Sun Mar 14 20:24:12 CET 2010

Robert,  the reason I suggested that it might be
necessary to start with a number bigger than 1 was this:

we are looking for a permutation of 1,2,3,... whose |diffs|
are 1,2,3,...  If no such permutation exists starting with 1,
then it is still possible that one exists that starts with 8 (say).


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