This is a semi-generic approach to generating sequences of numbers in Perl by an iterator, and for some sequences by "ith" or predicate too.
Math-NumSeq-73.tar.gz(839k, and sig)
libmath-numseq-perl_73-0.1_all.deb(509k, and sig)
And some separate "alphabetical" related sequences, using the "Lingua" modules. Download from CPAN, or here.
Math-NumSeq-Alpha-3.tar.gz(54k, and sig)
libmath-numseq-alpha-perl_3-0.1_all.deb(18k, and sig)
includes some NumSeq tie-ins to present coordinates and turns as sequences.
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