OFFSET
1,1
COMMENTS
(spf(n+2),spf(n)) are twin prime pairs.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
MATHEMATICA
Flatten[Position[Partition[Table[FactorInteger[n][[1, 1]], {n, 1300}], 3, 1], _?(#[[1]]-2==#[[3]]&), {1}, Heads->False]] (* Harvey P. Dale, Mar 07 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Feb 21 2003
STATUS
approved