The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A058469 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A058469

Numbers k such that k^2 contains only digits {5,8,9}.
(history; published version)

#7 by N. J. A. Sloane at Sun Aug 11 14:41:33 EDT 2024

LINKS

P. De Geest, <a href="httphttps://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>

Discussion

Sun Aug 11

14:41

OEIS Server: https://oeis.org/edit/global/2998

#6 by Jon E. Schoenfield at Fri Oct 18 22:13:55 EDT 2019

STATUS

editing

approved

#5 by Jon E. Schoenfield at Fri Oct 18 22:13:53 EDT 2019

NAME

Numbers n k such that nk^2 contains only digits {5,8,9}.

AUTHOR

Patrick De Geest, Nov 15 2000.

STATUS

approved

editing

#4 by Charles R Greathouse IV at Fri Aug 24 10:48:23 EDT 2012

AUTHOR

_Patrick De Geest (pdg(AT)worldofnumbers.com), _, Nov 15 2000.

Discussion

Fri Aug 24

10:48

OEIS Server: https://oeis.org/edit/global/1824

#3 by N. J. A. Sloane at Wed Sep 22 03:00:00 EDT 2004

NAME

Numbers n such that n^2 contains only digits {5,8,9}.

KEYWORD

nonn,base,hard,more,bref,new

#2 by N. J. A. Sloane at Sat Sep 13 03:00:00 EDT 2003

KEYWORD

nonn,base,hard,more,bref,new

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 15 2000.

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

n^2 contains only digits {5,8,9}.

DATA

3, 99927917, 92496431583

OFFSET

1,1

LINKS

P. De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Index to related sequences</a>

Hisanori Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm#589">Sporadic tridigital solutions</a>

CROSSREFS

Cf. A058470.

KEYWORD

nonn,base,hard,more,bref

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 2000.

STATUS

approved