×

On the distribution of almost primes in an interval. (English) Zbl 0381.10033


MSC:

11N35 Sieves
11P32 Goldbach-type theorems; other additive questions involving primes
11N13 Primes in congruence classes
PDFBibTeX XMLCite

Online Encyclopedia of Integer Sequences:

Number of semiprimes strictly between n^2 and (n+1)^2.