OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
251,257,263,269 are consecutive primes,257=251+6,263=251+12,269=251+18 and 251=6*41+5
MATHEMATICA
Transpose[Select[Partition[Prime[Range[30000]], 4, 1], Differences[#]=={6, 6, 6}&&IntegerQ[(#[[1]]-5)/6]&]][[1]] (* Harvey P. Dale, Dec 12 2015 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Pierre CAMI, Dec 09 2003
EXTENSIONS
More terms from Harvey P. Dale, Dec 12 2015
STATUS
approved