The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A112321

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A112321

Least n-digit number whose square is exclusionary, or 0 if no such number exists.
(history; published version)

#12 by Jon E. Schoenfield at Sun Apr 28 18:05:52 EDT 2019

STATUS

editing

approved

#11 by Jon E. Schoenfield at Sun Apr 28 18:05:49 EDT 2019

NAME

Least n-digit number such that its whose square is exclusionary, or 0 if no such number exists.

REFERENCES

H. Ibstedt, Solution to Problem 2623 "Exclusionary Powers", Journal of Recreational Mathematics pp. 346-9 Vol. 32 no. 4 2003-4 Baywood NY.

STATUS

approved

editing

#10 by Joerg Arndt at Sun Jan 13 03:53:43 EST 2013

STATUS

proposed

approved

#9 by Michel Marcus at Sun Jan 13 03:26:53 EST 2013

STATUS

editing

proposed

#8 by Michel Marcus at Sun Jan 13 03:07:21 EST 2013

COMMENTS

m has an exclusionary square if m consists of distict distinct digits and m^2 is made up only of digits not appearing in m.

STATUS

approved

editing

#7 by Russ Cox at Sat Mar 31 10:26:04 EDT 2012

AUTHOR

_Lekraj Beedassy (blekraj(AT)yahoo.com) _ and Klaus Brockhaus, Sep 08 2005

Discussion

Sat Mar 31

10:26

OEIS Server: https://oeis.org/edit/global/489

#6 by Russ Cox at Fri Mar 30 17:27:47 EDT 2012

AUTHOR

Lekraj Beedassy (blekraj(AT)yahoo.com) and _Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), _, Sep 08 2005

Discussion

Fri Mar 30

17:27

OEIS Server: https://oeis.org/edit/global/145

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

KEYWORD

nonn,base,fini,new

AUTHOR

Lekraj Beedassy (boodhimanblekraj(AT)yahoo.com) and Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 08 2005

#4 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

REFERENCES

H. Ibstedt, Solution to Problem 2623 "Exclusionary Powers", Journal of Recreational Mathematics pp . 346-9 Vol. 32 no.4 2003-4 Baywood NY.

KEYWORD

nonn,base,fini,new

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

KEYWORD

nonn,base,newfini