OFFSET
1,1
COMMENTS
Entries may be repeated and are shown in order of increasing generator n.
EXAMPLE
n=8: 8/(p(8+1)-p(8))=8/(23-19)=2=a(1).
n=10: 10/(p(10+1)-p(10))=10/(31-29)=5=a(2).
n=12: 12/(p(12+1)-p(12))=12/(41-37)=3=a(3).
n=18: 18/(p(18+1)-p(18))=18/(67-61)=3=a(4).
n=24: 24/(p(24+1)-p(24))=24/(97-89)=3=a(5).
n=26: 26/(p(26+1)-p(26))=26/(103-101)=13=a(6),
MATHEMATICA
With[{nn=3000}, Select[#[[1]]/#[[2]]&/@Thread[{Range[nn-1], #[[2]]-#[[1]]&/@ Partition[Prime[Range[nn]], 2, 1]}], PrimeQ]] (* Harvey P. Dale, Apr 13 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Sep 12 2008
EXTENSIONS
Corrected and extended by R. J. Mathar, Sep 26 2008
STATUS
approved