The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A053954

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A053954

Numbers k such that k^2 contains only digits {4,5,9}.
(history; published version)

#12 by N. J. A. Sloane at Sun Aug 11 14:41:32 EDT 2024

LINKS

P. De Geest, <a href="httphttps://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>

Discussion

Sun Aug 11

14:41

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

#11 by Susanna Cuyler at Fri Oct 18 21:25:58 EDT 2019

STATUS

proposed

approved

#10 by Jon E. Schoenfield at Fri Oct 18 20:10:35 EDT 2019

STATUS

editing

proposed

#9 by Jon E. Schoenfield at Fri Oct 18 20:10:32 EDT 2019

NAME

Numbers n k such that nk^2 contains only digits {4,5,9}.

AUTHOR

Patrick De Geest, Mar 15 2000.

EXTENSIONS

Two more terms from Mishima's webpage. _ added by _Max Alekseyev_, May 18 2009

STATUS

approved

editing

#8 by Charles R Greathouse IV at Fri Aug 24 10:48:18 EDT 2012

AUTHOR

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

Discussion

Fri Aug 24

10:48

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

#7 by Russ Cox at Fri Mar 30 17:26:43 EDT 2012

LINKS

H. Mishima <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a> [From _Max Alekseyev (maxale(AT)gmail.com), _, May 18 2009]

EXTENSIONS

Two more terms from Mishima's webpage. _Max Alekseyev (maxale(AT)gmail.com), _, May 18 2009

Discussion

Fri Mar 30

17:26

OEIS Server: https://oeis.org/edit/global/140

#6 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

DATA

2, 3, 7, 212, 2357, 23357, 244038, 678196107, 745281554823038, 703957001491895099962643

LINKS

H. Mishima <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a> [From Max Alekseyev (maxale(AT)gmail.com), May 18 2009]

KEYWORD

nonn,base,more,new

EXTENSIONS

Two more terms from Mishima's webpage. Max Alekseyev (maxale(AT)gmail.com), May 18 2009

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

OFFSET

0,1,1

KEYWORD

nonn,base,more,new

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

NAME

Numbers n such that n^2 contains only digits {4,5,9}.

KEYWORD

nonn,base,more,new

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

KEYWORD

nonn,base,more,new

AUTHOR

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