OFFSET
1,1
COMMENTS
Ratio of the number of odd terms to the number of even terms increases with increasing n. - Zak Seidov, May 22 2015
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
a[8]=39 because 39=(37+41)/2 and 39=3*13
MATHEMATICA
Select[Mean/@Partition[Prime[Range[250]], 2, 1], PrimeOmega[#]==2&] (* Harvey P. Dale, Oct 08 2013 *)
PROG
(PARI) lista(nn) = {prevp = 2; forprime (p=3, nn, n = p + prevp; if (n % 2 == 0, if (bigomega(n/2) == 2, print1(n/2, ", "); ); ); prevp = p; ); } \\ Michel Marcus, Jun 09 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Lior Manor, Dec 31 2002
STATUS
approved