Math::NumSeq::Palindromes -- palindrome numbers like 15351
use Math::NumSeq::Palindromes; my $seq = Math::NumSeq::Palindromes->new; my ($i, $value) = $seq->next;
The palindrome numbers which read the same backwards and forwards.
0 .. 9, 11, 22, ..., 99, 101, 111, 121, ... 191, 202, ... # starting i=1 value=0
The default is decimal or the radix
parameter can select another base.
See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.
$seq = Math::NumSeq::Palindromes->new ()
$seq = Math::NumSeq::Palindromes->new (radix => $r)
Create and return a new sequence object.
$seq->seek_to_i($i)
Move the current sequence position to $i
. The next call to next()
will return $i
and corresponding value.
$value = $seq->ith($i)
Return the $i
'th palindrome number.
$bool = $seq->pred($value)
Return true if $value
is a palindrome, ie. its digits read the same forwards and backwards (in the given radix
).
Math::NumSeq, Math::NumSeq::Repdigits
http://user42.tuxfamily.org/math-numseq/index.html
Copyright 2010, 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/>.