OFFSET
1,1
COMMENTS
Subsequence of A047948. - R. J. Mathar, Feb 11 2013
LINKS
R. J. Mathar, Table of n, a(n) for n = 1..1000
FORMULA
Primes p = p(i) such that p(i+1) = p+6, p(i+2) = p+6+6, p(i+3) = p+6+6+4.
EXAMPLE
p=151, 151+6 = 157, 151+6+6 = 163, 151+6+6+4 = 167 are consecutive primes.
MATHEMATICA
Transpose[Select[Partition[Prime[Range[6600]], 4, 1], Differences[#] == {6, 6, 4}&]][[1]] (* Harvey P. Dale, Nov 04 2011 *)
CROSSREFS
Cf. analogous prime quadruple sequences with various possible {2, 4, 6}-difference-patterns in brackets: A007530[242], A078847[246], A078848[264], A078849[266], A052378[424], A078850[426], A078851[462], A078852[466], A078853[624], A078854[626], A078855[642], A078856[646], A078857[662], A078858[664], A033451[666].
KEYWORD
nonn
AUTHOR
Labos Elemer, Dec 11 2002
EXTENSIONS
Listed terms verified by Ray Chandler, Apr 20 2009
STATUS
approved