OFFSET
1,2
COMMENTS
LINKS
A. Dinculescu, Table of n, a(n) for n = 1..10001
A. Dinculescu, On the Numbers that Determine the Distribution of Twin Primes, Surveys in Mathematics and its Applications, 13 (2018), 171-181.
PROG
(PARI) select( is(n)=!for(s=1, 2, ispseudoprime(6*n^2+(-1)^s)||return), [1..5000])
CROSSREFS
KEYWORD
nonn
AUTHOR
M. F. Hasler and Antonie Dinculescu, Jun 14 2019
STATUS
approved