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Revision History for A014311

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Showing entries 1-10 | older changes

A014311

Numbers with exactly 3 ones in binary expansion.
(history; published version)

#72 by R. J. Mathar at Thu Jun 27 10:32:01 EDT 2024

STATUS

editing

approved

#71 by R. J. Mathar at Thu Jun 27 10:30:58 EDT 2024

FORMULA

Sum_{n>=1} 1/a(n) = A367110 = 1.428591545852638123996854844400537952781688750906133068397189529775365950039... (calculated using Baillie's irwinSums.m, see Links). - Amiram Eldar, Feb 14 2022

STATUS

approved

editing

#70 by Joerg Arndt at Mon Feb 14 01:23:25 EST 2022

STATUS

reviewed

approved

#69 by Michel Marcus at Mon Feb 14 00:49:44 EST 2022

STATUS

proposed

reviewed

#68 by Amiram Eldar at Mon Feb 14 00:44:18 EST 2022

STATUS

editing

proposed

#67 by Amiram Eldar at Mon Feb 14 00:08:31 EST 2022

FORMULA

A000120(a(n)) = 3. [_- _Reinhard Zumkeller_, May 03 2012]

#66 by Amiram Eldar at Mon Feb 14 00:08:08 EST 2022

FORMULA

Sum_{n>=1} 1/a(n) = 1.428591545852638123996854844400537952781688750906133068397189529775365950039744428591545852638123996854844400537952781688750906133068397189529775365950039... (calculated using Baillie's irwinSums.m, see Links). - Amiram Eldar, Feb 14 2022

#65 by Amiram Eldar at Mon Feb 14 00:07:44 EST 2022

LINKS

Robert Baillie, <a href="http://arxiv.org/abs/0806.4410">Summing the curious series of Kempner and Irwin</a>, arXiv:0806.4410 [math.CA], 2008-2015. See p. 18 for Mathematica code irwinSums.m.

FORMULA

Sum_{n>=1} 1/a(n) = 1.428591545852638123996854844400537952781688750906133068397189529775365950039744... (calculated using Baillie's irwinSums.m, see Links). - Amiram Eldar, Feb 14 2022

STATUS

approved

editing

#64 by N. J. A. Sloane at Sun Apr 18 22:39:33 EDT 2021

STATUS

reviewed

approved

#63 by Joerg Arndt at Sat Apr 17 05:54:55 EDT 2021

STATUS

proposed

reviewed