The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A247165

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A247165

Numbers m such that m^2 + 1 divides 2^m - 1.
(history; published version)

#52 by Michel Marcus at Fri Feb 09 01:42:19 EST 2024

STATUS

reviewed

approved

#51 by Joerg Arndt at Fri Feb 09 00:40:47 EST 2024

STATUS

proposed

reviewed

#50 by Michel Marcus at Fri Feb 09 00:07:12 EST 2024

STATUS

editing

proposed

#49 by Michel Marcus at Fri Feb 09 00:06:59 EST 2024

CROSSREFS

Cf. A005574, A135590, A176997.

STATUS

proposed

editing

#48 by Jon E. Schoenfield at Fri Feb 09 00:05:05 EST 2024

STATUS

editing

proposed

#47 by Jon E. Schoenfield at Fri Feb 09 00:04:55 EST 2024

COMMENTS

For each n, a(n)^2 + 1 belong belongs to A176997, and thus a(n) belongs to either A005574 or A135590. - Max Alekseyev, Feb 08 2024

STATUS

proposed

editing

#46 by Max Alekseyev at Thu Feb 08 19:52:49 EST 2024

STATUS

editing

proposed

#45 by Max Alekseyev at Thu Feb 08 19:52:04 EST 2024

NAME

Numbers n m such that nm^2 + 1 divides 2^n m - 1.

COMMENTS

Next term > 10^9. - Joerg Arndt, Nov 30 2014

For each n, a(n)^2 + 1 belong to A176997, and thus a(n) belongs to either A005574 or A135590. - Max Alekseyev, Feb 08 2024

STATUS

approved

editing

#44 by Charles R Greathouse IV at Thu Sep 08 08:46:09 EDT 2022

PROG

(MAGMAMagma) [n: n in [1..100000] | Denominator((2^n-1)/(n^2+1)) eq 1];

Discussion

Thu Sep 08

08:46

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

#43 by Peter Luschny at Mon Sep 17 03:13:33 EDT 2018

STATUS

proposed

approved