OFFSET
1,15
COMMENTS
The number of partitions of 2n into exactly two parts such that the smaller part is an odd composite integer, n > 1.
Sequence decreases by 1 when n is an even prime and increases by 1 when n is an odd composite. - Wesley Ivan Hurt, Dec 27 2013
FORMULA
EXAMPLE
a(18) =2. 2*18=38 has two partitions into exactly two odd parts with smallest part composite: (27,9) and (21,15). - Wesley Ivan Hurt, Dec 27 2013
MAPLE
seq(ceil(n/2)-numtheory[pi](n), n=1..100);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wesley Ivan Hurt, Jun 25 2013
STATUS
approved