OFFSET
1,1
COMMENTS
for n < 100000 more than 90% of the primes are of the form 6*p*(6*p+x) +1 or -1 with -6*p < x < 6*p, what for n > 100000 ?
LINKS
Pierre CAMI, Table of n, a(n) for n = 1..862
EXAMPLE
2,3,5,7 are < 6*2, so the sequence starts 2,3,5,7 6*2*(6*2-11)-1=11 prime so 11 not in the sequence 6*2*(6*2-11)+1=13 prime so 13 not in the sequence ................ 383+1=384, 384/12 = 32, 383=6*2(6*2+20)-1, 20 > 6*2 so 383 = q(5)
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Oct 21 2008
STATUS
approved