OFFSET
1,1
REFERENCES
David Rhee and Jerry Lo, Mathematical Wizardy for A Gardener, pp. 165-173.
LINKS
Erich Friedman, Problem of the month November 2009
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Kausthub Gudipati, Oct 04 2011
EXTENSIONS
Corrected Name: elevators and stops were interchanged. - Robert Price, May 30 2013
STATUS
approved