OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
p(271)=1741: 1741,1747,1753,1759 are consecutive primes,1747=1741+6,1753=1741+12,1759=1741+18 and 1741=6*290+1
MATHEMATICA
PrimePi/@Transpose[Select[Partition[Prime[Range[50000]], 4, 1], Differences[ #] == {6, 6, 6}&&Mod[#[[1]], 6]==1&]][[1]] (* Harvey P. Dale, Nov 04 2015 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Pierre CAMI, Dec 09 2003
EXTENSIONS
More terms from Harvey P. Dale, Nov 04 2015
STATUS
approved