NAME

Math::NumSeq::WoodallNumbers -- Woodall numbers i*2^i-1

SYNOPSIS

use Math::NumSeq::WoodallNumbers;
my $seq = Math::NumSeq::WoodallNumbers->new;
my ($i, $value) = $seq->next;

DESCRIPTION

The Woodall numbers 1, 7, 23, 63, etc, i*2^i-1 starting from i=1.

FUNCTIONS

$seq = Math::NumSeq::WoodallNumbers->new (key=>value,...)

Create and return a new sequence object.

$value = $seq->ith($i)

Return $i * 2**$i - 1.

$bool = $seq->pred($value)

Return true if $value is a Woodall number, ie. is equal to i*2^i-1 for some i.

SEE ALSO

Math::NumSeq, Math::NumSeq::CullenNumbers, Math::NumSeq::ProthNumbers

HOME PAGE

http://user42.tuxfamily.org/math-numseq/index.html

LICENSE

Copyright 2011 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/>.