The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A003597 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A003597

Numbers of the form 3^i*11^j.
(history; published version)

#34 by Jon E. Schoenfield at Sun Oct 22 16:25:36 EDT 2023

STATUS

editing

approved

#33 by Jon E. Schoenfield at Sun Oct 22 16:25:33 EDT 2023

AUTHOR

N. J. A. Sloane.

STATUS

approved

editing

#32 by Charles R Greathouse IV at Thu Sep 08 08:44:32 EDT 2022

PROG

(MAGMAMagma) [n: n in [1..4*10^5] | PrimeDivisors(n) subset [3, 11]]; // Vincenzo Librandi, Jun 27 2016

Discussion

Thu Sep 08

08:44

OEIS Server: https://oeis.org/edit/global/2944

#31 by Vaclav Kotesovec at Wed Sep 23 03:29:30 EDT 2020

STATUS

editing

approved

#30 by Vaclav Kotesovec at Wed Sep 23 03:29:24 EDT 2020

FORMULA

a(n) ~ exp(sqrt(2*log(3)*log(11)*n)) / sqrt(33). - Vaclav Kotesovec, Sep 23 2020

STATUS

approved

editing

#29 by Joerg Arndt at Wed Sep 23 02:45:02 EDT 2020

STATUS

reviewed

approved

#28 by Vaclav Kotesovec at Wed Sep 23 02:43:58 EDT 2020

STATUS

proposed

reviewed

#27 by Amiram Eldar at Wed Sep 23 02:09:35 EDT 2020

STATUS

editing

proposed

#26 by Amiram Eldar at Wed Sep 23 01:53:10 EDT 2020

KEYWORD

nonn,easy,changed

#25 by Amiram Eldar at Wed Sep 23 01:51:15 EDT 2020

FORMULA

Sum_{n>=1} 1/a(n) = (3*11)/((3-1)*(11-1)) = 33/20. - Amiram Eldar, Sep 23 2020

STATUS

approved

editing