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Revision History for A284691

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A284691

Numbers of the form (10^c-1)*the product any two (not necessarily distinct) terms of A074992.
(history; published version)

#26 by Joerg Arndt at Tue Oct 03 10:30:00 EDT 2017

STATUS

reviewed

approved

#25 by Michel Marcus at Tue Oct 03 10:29:13 EDT 2017

STATUS

proposed

reviewed

#24 by Ahmad J. Masad at Tue Oct 03 10:19:46 EDT 2017

STATUS

editing

proposed

Discussion

Tue Oct 03

10:29

Michel Marcus: yes

#23 by Ahmad J. Masad at Tue Oct 03 10:19:36 EDT 2017

EXAMPLE

a(43) = 37*9 = 333, with respect to strictly increasing ordering.

STATUS

approved

editing

#22 by N. J. A. Sloane at Sun Apr 02 10:29:57 EDT 2017

STATUS

editing

approved

#21 by N. J. A. Sloane at Sun Apr 02 10:29:52 EDT 2017

COMMENTS

First conjectureConjecture 1: all terms are palindromic in base 10.

Second conjectureConjecture 2: the sequence A074992 is the maximally dense sequence with this palindromic products property.

STATUS

proposed

editing

#20 by Ahmad J. Masad at Sat Apr 01 13:39:12 EDT 2017

STATUS

editing

proposed

#19 by Ahmad J. Masad at Sat Apr 01 13:38:21 EDT 2017

NAME

The strictly increasing order of the products of any number Numbers of the form (10^c-1) by *the product any two (not necessarily distinct) terms of A074992.

STATUS

proposed

editing

Discussion

Sat Apr 01

13:39

Ahmad J. Masad: Thank you Giovanni Resta for the advise , Changes have been made.

#18 by Giovanni Resta at Sat Apr 01 13:26:39 EDT 2017

STATUS

editing

proposed

#17 by Giovanni Resta at Sat Apr 01 13:26:34 EDT 2017

KEYWORD

nonn,base,changed

STATUS

proposed

editing