The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A056811

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A056811

Number of primes not exceeding square root of n: primepi(sqrt(n)).
(history; published version)

#49 by Hugo Pfoertner at Thu Aug 15 06:38:39 EDT 2024

STATUS

reviewed

approved

#48 by Joerg Arndt at Thu Aug 15 06:19:06 EDT 2024

STATUS

proposed

reviewed

#47 by Jason Yuen at Thu Aug 15 04:15:58 EDT 2024

STATUS

editing

proposed

#46 by Jason Yuen at Thu Aug 15 04:15:53 EDT 2024

FORMULA

a(n) = A056170(A003418(n)) = A000720(A000196(n)).

STATUS

approved

editing

#45 by Charles R Greathouse IV at Thu Jul 11 12:38:18 EDT 2024

STATUS

proposed

approved

#44 by Michel Marcus at Sun Jul 07 04:11:26 EDT 2024

STATUS

editing

proposed

Discussion

Thu Jul 11

12:38

Charles R Greathouse IV: Neat!

#43 by Michel Marcus at Sun Jul 07 04:11:22 EDT 2024

COMMENTS

Maximum number of composite numbers not exceeding n that are all coprime to each other. -_ _Yifan Xie_, Jul 07 2024

STATUS

proposed

editing

#42 by Yifan Xie at Sun Jul 07 04:01:09 EDT 2024

STATUS

editing

proposed

#41 by Yifan Xie at Sun Jul 07 04:00:38 EDT 2024

COMMENTS

Maximum number of composite numbers not exceeding n that are all coprime to each other. -Yifan Xie, Jul 07 2024

STATUS

approved

editing

#40 by Michael De Vlieger at Thu Jan 20 10:33:13 EST 2022

STATUS

reviewed

approved