Chen, Jing-run On the distribution of almost primes in an interval. (English) Zbl 0381.10033 Sci. Sin. 18, 611-627 (1975). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 5 ReviewsCited in 7 Documents MSC: 11N35 Sieves 11P32 Goldbach-type theorems; other additive questions involving primes 11N13 Primes in congruence classes PDF BibTeX XML Cite \textit{J.-r. Chen}, Sci. Sin. 18, 611--627 (1975; Zbl 0381.10033) OpenURL Online Encyclopedia of Integer Sequences: Number of semiprimes strictly between n^2 and (n+1)^2.