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BibTeX entry
@Article{Chu:1991:FPT,
author = "I-Ping Chu and Richard Johnsonbaugh",
title = "The four-peg {Tower of Hanoi} puzzle",
journal = j-SIGCSE,
volume = "23",
number = "3",
pages = "2--4",
month = sep,
year = "1991",
CODEN = "SIGSD3",
DOI = "https://doi.org/10.1145/126459.126460",
ISSN = "0097-8418 (print), 2331-3927 (electronic)",
ISSN-L = "0097-8418",
bibdate = "Sat Nov 17 18:57:16 MST 2012",
bibsource = "http://portal.acm.org/;
http://www.math.utah.edu/pub/tex/bib/sigcse1990.bib",
abstract = "We discuss a version of the Tower of Hanoi puzzle in
which there are four pegs rather than three. The
four-peg puzzle provides a rich source of exercises
(samples of which are included) for students after the
familiar three-peg version has been presented. We give
an algorithm that solves the four-peg puzzle in the
claimed minimum number of moves (see [2, 4]). Our
algorithm solves the four-peg puzzle in $ O(4^{\sqrt
{n}}) $ moves whereas the best algorithm for the
three-peg puzzle requires $ 2^n - 1 $ moves. As far as
we know, the minimum number of moves required to solve
the four-peg puzzle is an open question.",
acknowledgement = ack-nhfb,
fjournal = "SIGCSE Bulletin (ACM Special Interest Group on
Computer Science Education)",
journal-URL = "http://portal.acm.org/browse_dl.cfm?idx=J688",
}
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30(1)82,
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30(3)213,
30(3)228,
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31(1)31,
31(1)122,
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31(2)60,
31(2)73,
31(3)60,
31(3)123,
31(3)143,
31(3)147,
31(4)13,
31(4)35,
31(4)48
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25(4)13,
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27(1)204,
27(1)223,
27(1)307,
27(2)31,
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28(1)256,
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28(z)6,
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29(1)214,
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30(1)282,
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31(1)17,
31(1)160,
31(1)208,
31(1)242,
31(1)301,
31(2)86,
31(3)151,
31(3)159,
31(3)167,
31(3)175,
31(3)201,
31(4)13,
31(4)35
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31(3)119
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22(4)2,
22(4)55,
24(4)49,
26(1)46,
26(1)198,
26(1)253,
27(1)141,
27(1)191,
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