[seqfan] Non-primes and non-prime sums
Eric Angelini
Eric.Angelini at kntv.be
Tue Jan 15 11:49:33 CET 2013
Hello Seq-Fans,
Write down the non prime numbers:
1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, ...
Insert between two non-primes the
smallest prime not yet present
in the sequence such that two
neighboring integers sum to a
non-prime.
I think the sequence starts:
1,5,4,2,6,43,8,7,9,11,10,23,12,13,14,31,15,17,16,...
Best,
É.
[many thanks to those who answered
the equivalent post, yesterday --
the seq has been kindly entered by
Maximilian Hasler is here:
http://oeis.org/A209259]
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