Let be the be one less than the number of odds less than (so we are not counting as it is a unit and we are going to be interested in composits and primes only). and let be a prime counting function that gives the number of primes less than .

Also let denote the number of pairs with and composite, and . Then:

If I have done this right, the right hand side of this inequality should be the number of odd composites less than .

RonL