[seqfan] A088867 and A003824: solutions to a^4+b^4=c^4+d^4

Maximilian Hasler maximilian.hasler at gmail.com
Tue Mar 6 05:49:05 CET 2012

Dear SeqFans,

A088867 : Numbers that can be expressed as the sum of two distinct 4th
powers in exactly two distinct ways that have at least one repeated

had some issues.
I think I fixed most of them and invite anyone who has some insight
and/or already looked into this to check my draft edits & comments at

In particular it had the kw "fini", I think this is incorrect.
(If you can confirm, it should be removed in A88849, too.
If I'm wrong, should it also be added to A3824 ?)

Also, there are 2 links to documents on msnusers.com which seem
broken, and although web.archive lists dates of captures,
I only get empty pages when I follow these links.
(This may be an issue of my browser, and/or due to the fact that these
are .txt and not .html files.)



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