++ed by:
Kevin Ryde
and 1 contributors

# NAME

Math::NumSeq::Perrin -- Perrin sequence

# SYNOPSIS

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

# DESCRIPTION

The Perrin sequence,

``    3, 0, 2, 3, 2, 5, 5, 7, 10, 12, 17, 22, 29, 39, 51, etc``

which is the recurrence

``    P(i) = P(i-2) + P(i-3)``

starting from 3,0,2. So for example 29 is 12+17.

``````    12, 17, 22, 29

|   |       ^
|   |       |

# FUNCTIONS

See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.

`\$seq = Math::NumSeq::Perrin->new (length => \$integer)`

Create and return a new sequence object.

## Random Access

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

Return the `\$i`'th value from the sequence.

`\$i = \$seq->value_to_i_estimate(\$value)`

Return an estimate of the i corresponding to `\$value`.

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/>.