Unfortunately David W. Wilson told the readers of the mailinglist seqfan that he is unable to continue working on mathematics. He calculated all smallest addition chains upto 1024. You can download his work here (5.5 Mb). Find here e.g. all chains for 23 and his readme.
I did a lot of research on addition chains. At the moment you are able to download:
Terug naar mijn homepage
Last update: april 7, 2006