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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 A211659

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

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Last modified June 6 17:01 EDT 2020. Contains 334829 sequences. (Running on oeis4.)