The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A073882 Number of primes between n and n^2. 7
 0, 2, 3, 4, 7, 8, 12, 14, 18, 21, 26, 29, 34, 38, 42, 48, 55, 59, 65, 70, 77, 84, 91, 96, 105, 113, 120, 128, 137, 144, 152, 161, 170, 180, 189, 199, 208, 216, 228, 239, 251, 261, 270, 281, 292, 305, 315, 327, 342, 352, 363, 378, 394, 405, 418, 429, 441, 458, 471 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = Sum_{k=n..n^2} A010051(k) = A117490(n) + A010051(n). - Reinhard Zumkeller, May 20 2010 LINKS R. Zumkeller, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A038107(n) - A000720(n) + A010051(n). - Reinhard Zumkeller, May 20 2010 PROG (PARI) a(n)=sum(k=n, n^2, isprime(k)) CROSSREFS Sequence in context: A050048 A122456 A186243 * A015840 A051213 A340111 Adjacent sequences: A073879 A073880 A073881 * A073883 A073884 A073885 KEYWORD nonn AUTHOR Amarnath Murthy, Aug 16 2002 EXTENSIONS Corrected and extended by Benoit Cloitre, Aug 20 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 22 08:43 EDT 2023. Contains 361419 sequences. (Running on oeis4.)