[seqfan] Another chemistry related sequence?

Antti Karttunen antti.karttunen at gmail.com
Wed Sep 2 10:14:10 CEST 2009

Here is an idea for atomic elements related sequence that should
be reasonably well defined:

a(n) = The number of stable isotopes the element number n has.

If the information in Wikipedia is correct, the sequence should start as:

Note that both a(83) ( http://en.wikipedia.org/wiki/Bismuth )
and a(92) ( http://en.wikipedia.org/wiki/Uranium ) should be 0.

(Or is it? Okay, we can speculate about the eventual decaying of protons,
but... Also, I mean stable at "the normal room temperature conditions", not
a particle accelerator.)



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