OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
Do[If[OddQ[(Prime[n + 1] + Prime[n])/2] && Mod[(Prime[n + 1] + Prime[n])/2, 11] == 0, Print[(Prime[n + 1] + Prime[n])/2]], {n, 1, 3000}]
Select[Mean/@Partition[Prime[Range[2, 2000]], 2, 1], OddQ[#]&&Divisible[#, 11]&] (* Harvey P. Dale, Mar 14 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Dec 21 2006
STATUS
approved