[seqfan] Two digits touching a comma stick to a prime

Eric Angelini Eric.Angelini at kntv.be
Sun Nov 24 19:43:54 CET 2013


Hello SeqFans,

If you concatenate the two digits
touching any comma of T, you'll
get a prime.
(Warning: "02","03","05","07" must 
be seen as the primes 2,3,5 and 7).
T has been started with 1 and always 
extended with the smallest integer not
occuring earlier and not leading to a
contradiction. T might look like:

T=1,3,7,9,70,2,30,5,31,10,20,21,11,
12,32,33,13,14,15,34,16,17,18,35,
36,19,71,37,38,39,72,90,22,91,73,
74,75,92,93,76,77,94,78,95,96,79,...

Best,
É.



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