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A171713
2n-th twin prime such that the q-th prime of the form 6*k-1 and the q-th prime of the form 6*k+1 are the 2n-th and (2n+1)-st twin primes (A001097).
1
5, 11, 17, 41, 227
OFFSET
1,1
EXAMPLE
a(1)=5 because 1st primes (6*1-1=5 and 6*1+1=7) are a pair of twin primes;
a(2)=11 because 2nd primes (6*2-1=11 and 6*2+1=13) are a pair of twin primes;
a(3)=17 because 3rd primes (6*3-1=17 and 6*3+1=19) are a pair of twin primes;
a(4)=41 because 6th primes (6*7-1=41 and 6*7+1=43) are a pair of twin primes;
a(5)=227 because 24th primes (6*38-1=227 and 6*38+1=229) are a pair of twin primes.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
Incorrect a(6) removed by R. J. Mathar, Jun 07 2010
STATUS
approved