The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A014657 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A014657

Numbers m that divide 2^k + 1 for some nonnegative k.
(history; published version)

#81 by Joerg Arndt at Thu Sep 24 07:01:12 EDT 2020

STATUS

proposed

approved

#80 by Michel Marcus at Thu Sep 24 04:32:40 EDT 2020

STATUS

editing

proposed

#79 by Michel Marcus at Thu Sep 24 04:32:24 EDT 2020

COMMENTS

Without a(2) = 2 this is the complement of A014659 relative to the the odd positive integers A005408.

STATUS

approved

editing

Discussion

Thu Sep 24

04:32

Michel Marcus: recent "the the" typo

#78 by N. J. A. Sloane at Fri Sep 11 04:08:49 EDT 2020

STATUS

editing

approved

#77 by N. J. A. Sloane at Fri Sep 11 04:08:47 EDT 2020

COMMENTS

For the least nonnegative integer k(n) with 2^k(n) + 1 == d(n)*a(n), for n >= 1, see k(n) = A337219A195610(n) and d(n) = A337220(n).

CROSSREFS

Cf. A000051, A003558, A005408, A014659, A014661, A091317, A179480, A195470, A195610, A332433, A337219, A337220.

STATUS

approved

editing

#76 by Wolfdieter Lang at Tue Aug 25 05:33:51 EDT 2020

STATUS

editing

approved

#75 by Wolfdieter Lang at Tue Aug 25 05:33:43 EDT 2020

COMMENTS

Without a(2) = 2 this is the complement of A014659 relative to the the odd positive odd integers A005408.

STATUS

approved

editing

#74 by N. J. A. Sloane at Mon Aug 24 22:52:05 EDT 2020

STATUS

proposed

approved

#73 by Wolfdieter Lang at Sat Aug 22 17:18:05 EDT 2020

STATUS

editing

proposed

#72 by Wolfdieter Lang at Sat Aug 22 17:17:40 EDT 2020

COMMENTS

Starting with a(3) = 3 these numbers are the odd moduli, named 2*n+1 in the members appear as subsequence definition of A003558 , for those elements where which the minus signs applies in the definition (see A332433(m) for the signs applying for A003558(m)). (End)

STATUS

proposed

editing