OFFSET
0,3
COMMENTS
a(n) is the number of ways to express 2*n as a sum of parts x such that x+2 is an odd prime. - David Wasserman, Apr 03 2003
FORMULA
G.f.: (A(sqrt(x))+A(-sqrt(x)))/2, where A(x) = 1/Product_{k>1} (1-x^(prime(k)-2)). - Vladeta Jovovic, Nov 12 2004
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Mar 10 2002
EXTENSIONS
More terms from David Wasserman, Apr 03 2003
STATUS
approved