[seqfan] A158714

israel at math.ubc.ca israel at math.ubc.ca
Fri May 9 19:53:08 CEST 2014


Title is A158714 Primes p such that p1=Ceiling[p/2]+p is prime and 
p2=Floor[p1/2]+p is prime. The data given match not this, but rather Primes 
p such that p1=Ceiling[p/2]+p is prime and p2=Floor[p1/2]+p1 is prime.

For example, A158714 is given as 19.
ceil(19/2) + 19 = 29 is prime.
floor(29/2) + 19 = 33 is composite, but floor(29/2) + 29 = 43 is prime.

So: change the definition to match the data, or the data to match the 
definition?

Robert Israel
University of British Columbia and D-Wave Systems



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