1Math::NumSeq::UlamSequeUnsceer(3C)ontributed Perl DocumeMnattaht:i:oNnumSeq::UlamSequence(3)
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NAME

6       Math::NumSeq::UlamSequence -- integers uniquely the sum of two previous
7       terms
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SYNOPSIS

10        use Math::NumSeq::UlamSequence;
11        my $seq = Math::NumSeq::UlamSequence->new;
12        my ($i, $value) = $seq->next;
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DESCRIPTION

15       Ulam sequences are integers which are the sum of two previous terms in
16       just one way.  The default starting values are 1,2,
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18           1, 2, 3, 4, 6, 8, 11, 13, 16, 18, 26, ...
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20       For example 11 is in the sequence because it's the sum of two previous
21       terms 3+8, and no other such sum.  Whereas 12 is not in the sequence
22       because there's two sums 4+8 and 1+11.
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FUNCTIONS

25       See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence
26       classes.
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28       "$seq = Math::NumSeq::UlamSequence->new ()"
29       "$seq = Math::NumSeq::UlamSequence->new (start_values => '2,5')"
30           Create and return a new sequence object.
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SEE ALSO

33       Math::NumSeq
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HOME PAGE

36       <http://user42.tuxfamily.org/math-numseq/index.html>
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LICENSE

39       Copyright 2010, 2011, 2012, 2013, 2014, 2016, 2019 Kevin Ryde
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41       Math-NumSeq is free software; you can redistribute it and/or modify it
42       under the terms of the GNU General Public License as published by the
43       Free Software Foundation; either version 3, or (at your option) any
44       later version.
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46       Math-NumSeq is distributed in the hope that it will be useful, but
47       WITHOUT ANY WARRANTY; without even the implied warranty of
48       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
49       General Public License for more details.
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51       You should have received a copy of the GNU General Public License along
52       with Math-NumSeq.  If not, see <http://www.gnu.org/licenses/>.
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56perl v5.32.1                      2021-01-27     Math::NumSeq::UlamSequence(3)