[seqfan] Four consecutive integers sum up to a prime

Eric Angelini Eric.Angelini at kntv.be
Thu Jan 7 18:35:33 CET 2010


Hello seqFans,
I guess this is a permutation of the natural numbers:

« Smallest positive integer not already in sequence
  with a(n)+a(n+1)+a(n+2)+a(n+3) prime »

S = 1,2,3,5,7,4,13,17,9,8,25,11,15,10,...

Based on:
http://www2.research.att.com/~njas/sequences/A055265

Best,
É.






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