Math::NumSeq::CullenNumbers -- Cullen numbers i*2^i+1
use Math::NumSeq::CullenNumbers; my $seq = Math::NumSeq::CullenNumbers->new; my ($i, $value) = $seq->next;
The Cullen numbers i*2^i+1 starting from i=0,
1, 3, 9, 25, 65, 161, 385, 897, 2049, 4609, 10241, ...
See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.
$seq = Math::NumSeq::CullenNumbers->new ()
Create and return a new sequence object.
$value = $seq->ith($i)
Return $i * 2**$i + 1.
$i * 2**$i + 1
$bool = $seq->pred($value)
Return true if $value is a Cullen number, ie. is equal to i*2^i+1 for some i.
$value
$i = $seq->value_to_i_estimate($value)
Return an estimate of the i corresponding to $value.
See "Value to i Estimate" in Math::NumSeq::WoodallNumbers.
Math::NumSeq, Math::NumSeq::WoodallNumbers
http://user42.tuxfamily.org/math-numseq/index.html
Copyright 2011, 2012, 2013, 2014 Kevin Ryde
Math-NumSeq is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.
Math-NumSeq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.
To install Math::NumSeq, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Math::NumSeq
CPAN shell
perl -MCPAN -e shell install Math::NumSeq
For more information on module installation, please visit the detailed CPAN module installation guide.