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Re^3: The Oldest Plays the Piano

by ambrus (Abbot)
on Dec 22, 2009 at 12:09 UTC ( #813859=note: print w/ replies, xml ) Need Help??

in reply to Re^2: The Oldest Plays the Piano
in thread The Oldest Plays the Piano

See also Explain one liner for fibonacci.

Update: Explain Fibonacci one-liner ?? too.

Update 2010-07-21: Try this for Catalan numbers:

perl -le'$==0,(1x$_)=~/(^)(|1(?2)(?2)(?(?{})))$(?{$=++})^/,print$=for +0..13'

Update 2010-11-21: A nicer version for the Catalan numbers:

perl -le'$==0,(1x$_)=~/^(|()1(?1)(?1)\2)$(?{$=++})^/,print$=for 0..13'

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