The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A203566

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A203566

Numbers that contain the product of any two adjacent digits as a substring, and have at least one pair of adjacent digits > 1.
(history; published version)

#17 by N. J. A. Sloane at Mon Jan 02 12:30:48 EST 2023

LINKS

E. Angelini, <a href="http://list.seqfan.eu/pipermailoldermail/seqfan/2012-January/016213.html">10 different digits, 9 products</a>, Posting to Seqfan List, Jan 03 2012

Discussion

Mon Jan 02

12:30

OEIS Server: https://oeis.org/edit/global/2957

#16 by Michel Marcus at Sun Jul 18 03:03:41 EDT 2021

STATUS

reviewed

approved

#15 by Joerg Arndt at Sun Jul 18 01:59:24 EDT 2021

STATUS

proposed

reviewed

#14 by Jon E. Schoenfield at Sun Jul 18 01:08:20 EDT 2021

STATUS

editing

proposed

#13 by Jon E. Schoenfield at Sun Jul 18 01:08:19 EDT 2021

COMMENTS

In the same way, any number obtained from some a(n) of this sequence by adding any number of digits '0' and '1' on either side is again in this sequence (126 -> 1126, 1260, 1261, ...). This suggests to define that "primitive" numbers of this kind be defined.

STATUS

approved

editing

#12 by N. J. A. Sloane at Fri Jun 10 00:20:59 EDT 2016

LINKS

E. Angelini, <a href="/A198298/a198298.pdf">10 different digits, 9 products</a> CCWP[Cached copy, with permission]

Discussion

Fri Jun 10

00:20

OEIS Server: https://oeis.org/edit/global/2522

#11 by N. J. A. Sloane at Thu Jun 09 22:58:23 EDT 2016

STATUS

editing

approved

#10 by N. J. A. Sloane at Thu Jun 09 22:58:21 EDT 2016

LINKS

E. Angelini, <a href="/A198298/a198298.pdf">10 different digits, 9 products</a> CCWP

STATUS

approved

editing

#9 by Russ Cox at Fri Mar 30 17:23:04 EDT 2012

AUTHOR

_M. F. Hasler (oeis2012-removeThis(AT)hasler.fr), _, Jan 03 2012

Discussion

Fri Mar 30

17:23

OEIS Server: https://oeis.org/edit/global/121

#8 by N. J. A. Sloane at Fri Mar 16 13:15:57 EDT 2012

STATUS

editing

approved