The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A359084 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A359084

Numbers k such that A246601(k) > 2*k.
(history; published version)

#12 by Michael De Vlieger at Mon Dec 26 09:45:30 EST 2022

STATUS

reviewed

approved

#11 by Joerg Arndt at Mon Dec 26 03:11:25 EST 2022

STATUS

proposed

reviewed

#10 by Amiram Eldar at Mon Dec 26 03:02:46 EST 2022

STATUS

editing

proposed

#9 by Amiram Eldar at Mon Dec 26 02:49:42 EST 2022

COMMENTS

Not all the terms are The least term that is not divisible by 4095. E.g., is a(208) = 1099511627775 = 2^40 - 1.

#8 by Amiram Eldar at Mon Dec 26 02:49:09 EST 2022

LINKS

Amiram Eldar, <a href="/A359084/b359084.txt">Table of n, a(n) for n = 1..208</a>

STATUS

approved

editing

#7 by Michael De Vlieger at Sat Dec 17 08:26:45 EST 2022

STATUS

reviewed

approved

#6 by Joerg Arndt at Sat Dec 17 02:55:11 EST 2022

STATUS

proposed

reviewed

#5 by Amiram Eldar at Thu Dec 15 15:44:53 EST 2022

STATUS

editing

proposed

#4 by Amiram Eldar at Thu Dec 15 15:41:34 EST 2022

COMMENTS

Since A246601(2^k-1) = sigma(2^k-1), 2^k-1 is a term for all even k in A103292 (or, all k , unless 2^k -1 is an odd and 2^k-1 is perfect number (A000396).

CROSSREFS

Cf. A000203 (sigma), A000396, A103292, A246601.

#3 by Amiram Eldar at Thu Dec 15 15:36:58 EST 2022

COMMENTS

Since A246601(2^k-1) = sigma(2^k-1), 2^k-1 is a term for all even k in A103292 (or, all k unless k is odd and 2^k-1 is perfect).