The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A116141 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A116141

Numbers k such that k concatenated with k-2 gives the product of two numbers which differ by 1.
(history; published version)

#8 by Susanna Cuyler at Tue Jul 20 23:44:39 EDT 2021

STATUS

proposed

approved

#7 by Jon E. Schoenfield at Tue Jul 20 23:26:16 EDT 2021

STATUS

editing

proposed

#6 by Jon E. Schoenfield at Tue Jul 20 23:26:14 EDT 2021

NAME

Numbers n k such that n k concatenated with nk-2 gives the product of two numbers which differ by 1.

STATUS

approved

editing

#5 by N. J. A. Sloane at Mon Nov 05 12:14:38 EST 2018

STATUS

editing

approved

#4 by N. J. A. Sloane at Mon Nov 05 12:14:36 EST 2018

CROSSREFS

Cf. A116134, A116142, A054214, A116154, A116272.

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 17:40:40 EDT 2012

AUTHOR

_Giovanni Resta (g.resta(AT)iit.cnr.it), _, Feb 06 2006

Discussion

Fri Mar 30

17:40

OEIS Server: https://oeis.org/edit/global/192

#2 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008

NAME

Numbers n such that n concatenated with n-2 gives the product of two numbers which differ by 1.

KEYWORD

nonn,base,new

#1 by N. J. A. Sloane at Fri Feb 24 03:00:00 EST 2006

NAME

n concatenated with n-2 gives the product of two numbers which differ by 1.

DATA

4, 5303944, 6677714, 2070936216988528558, 2969428172738875624, 6685545813563350444, 8013829604553736451395958429212, 9724110515510343256451213152382

OFFSET

1,1

EXAMPLE

6677714//6677712 = 8171728 * 8171729, where // denotes

concatenation.

CROSSREFS

Cf. A116134, A116142, A116154, A116272.

KEYWORD

nonn,base

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006

STATUS

approved