OFFSET
1,4
COMMENTS
a(n)=1 if 6n -/+ 1 are twin primes.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
MATHEMATICA
Table[(NextPrime[6*n] - NextPrime[6*n, -1])/2, {n, 1, 25}] (* G. C. Greubel, Sep 17 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, Feb 10 2008
STATUS
approved