1,1

A088183(a(n))>0; complement of A088185.

Table of n, a(n) for n=1..64.

25 = 2*2+3*7, therefore 25 is a term;

2*2+2*11 is the only partition of n=26 into two semiprimes,

gcd(2*2,2*11)=2>1, therefore 26 is not a term.

Cf. A001358.

Sequence in context: A118845 A050717 A188540 * A274407 A054986 A210582

Adjacent sequences: A088181 A088182 A088183 * A088185 A088186 A088187

nonn

Reinhard Zumkeller, Sep 22 2003

approved