OFFSET
1,1
COMMENTS
Note the patterns in the graph. These patterns depend on the number of prime factors of n: see color graph for different n's: n primes - black dots, n multiples of 3 - red dots, n multiples of 15 - green dots, n multiples of 105 - blue dots. - Zak Seidov, Nov 28 2013
LINKS
Zak Seidov, Table of n, a(n) for n = 1..10000
Zak Seidov, Color graph for different n's
MAPLE
N:= 10^4: # to get all terms before the first with a(n)+2*n > N
Primes:= select(isprime, {seq(2*i+1, i=1..N)}):
for n from 1 do
R:= Primes intersect map(`+`, Primes, -2*n);
if nops(R) < n then break fi;
A[n]:= R[n];
od:
seq(A[j], j=1..n-1); # Robert Israel, Aug 07 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Jul 29 2003
EXTENSIONS
Edited by Sam Alexander, Feb 26 2004
STATUS
approved