> . The last $n-1 chars overlap with the beginning 
> debruijn.pl 5 2 
AAEEDECEBEADDCDBDACCBCABBA 
123456789012345678901234567890

[download]

I don't understand how $n=5 (Alphabet size according to your code) results in length 26 instead of 25.

please explain°

edit

>  walk through on paper to believe that it's correct.

Your user image shows Richard P. Feynman and you are questioning scientific reviews in mathematics? Ironic :)

UPDATE

") did you mean $t-1 ?

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re^3: Generic De Bruijn Sequence (updated) by LanX
in thread Generic De Bruijn Sequence by QM

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