[seqfan] Maximal number of touching points between unit spheres

Felix Fröhlich felix.froe at gmail.com
Tue Feb 27 16:55:46 CET 2018


Dear SeqFans,

I had the idea for the following sequence:

Maximal total number of touching points between n unit spheres.

With offset 2, I get the following terms:

1, 3, 6, 9, 12, 15, 18, 21, 24

1) Can someone with more knowledge of the subject confirm these terms?
2) Can someone confirm that this is different from A214813?
3) Can someone confirm that this is the same as A008486?

Regarding 2), see second comment in A214813. Regarding 3), there is a
comment by Sergey Pavlov from Feb 03 2017 in A008486 that may be related to
this, but I am not sure about it.

So, is this already in the OEIS?

Best regards
Felix


More information about the SeqFan mailing list