The On-Line Encyclopedia of Integer Sequences (OEIS)

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Revision History for A116207

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 5.
(history; published version)

#10 by Susanna Cuyler at Mon Jul 19 01:19:26 EDT 2021

STATUS

proposed

approved

#9 by Jon E. Schoenfield at Sun Jul 18 21:38:16 EDT 2021

STATUS

editing

proposed

#8 by Jon E. Schoenfield at Sun Jul 18 21:38:14 EDT 2021

NAME

Numbers n k such that n k concatenated with nk+7 gives the product of two numbers which differ by 5.

STATUS

approved

editing

#7 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

#6 by R. J. Mathar at Wed Mar 28 16:16:28 EDT 2012

STATUS

editing

approved

#5 by R. J. Mathar at Wed Mar 28 16:16:20 EDT 2012

CROSSREFS

Cf. A11617, A116167, A116114, A116200, A116173, A116208, A116180, A116338.

STATUS

proposed

editing

#4 by R. J. Mathar at Wed Mar 28 13:43:20 EDT 2012

STATUS

editing

proposed

#3 by R. J. Mathar at Wed Mar 28 13:43:08 EDT 2012

CROSSREFS

Cf. A11617, A116200, A116173, A116208, A116180, A116338.

STATUS

approved

editing

#2 by N. J. A. Sloane at Fri May 11 03:00:00 EDT 2007

NAME

Numbers n such that n concatenated with n+7 gives the product of two numbers which differ by 5.

EXAMPLE

72757727//72757734 = 85298138 * 85298143, where // denotes concatenation.

concatenation.

CROSSREFS

Cf. A116200, A116206, A116173, A116208, A116220, A116180, A116338.

KEYWORD

nonn,base,new

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

NAME

n concatenated with n+7 gives the product of two numbers which differ by 5.

DATA

493, 607, 629, 757, 17927, 33247, 93869, 19467217, 31223879, 72757727, 13454739732766891651472740499, 40093333713615672956030023507, 48089152118689474641229584727, 66424317743191484432891678269

OFFSET

1,1

EXAMPLE

72757727//72757734 = 85298138 * 85298143, where // denotes

concatenation.

CROSSREFS

Cf. A116200, A116206, A116208, A116220, A116338.

KEYWORD

nonn,base

AUTHOR

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

STATUS

approved