NAME

App::MathImage::NumSeq::ReverseAddSteps -- steps of the reverse-add algorithm

SYNOPSIS

use App::MathImage::NumSeq::ReverseAddSteps;
my $seq = App::MathImage::NumSeq::ReverseAddSteps->new;
my ($i, $value) = $seq->next;

DESCRIPTION

The number of steps to reach a palindrome by the reverse-digits and add algorithm. For example the i=19 is 3 because 19+91=110, then 110+011=121

FUNCTIONS

$seq = App::MathImage::NumSeq::ReverseAddSteps->new (key=>value,...)

Create and return a new sequence object.

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

Return the number of reverse-add steps required to reach a palindrome. For some numbers this is very large and conjectured to be infinite, so in the current code a limit of 30 is imposed.

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

Return true if $value >= 0, since any count of steps is possible.

SEE ALSO

Math::NumSeq, Math::NumSeq::Cubes

HOME PAGE

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

LICENSE

Copyright 2010, 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/>.