A261409 - OEIS

%I #13 Aug 27 2015 11:50:51

%S -11,21,25,27,28,34,36,40,42,43,46,48,49,51,54,57,61,63,64,67,69,70,

%T 72,73,75,78,79,81,82,84,85

%N Curvatures in a certain bounded, integral, primitive Soddy sphere packing.

%C A three-dimensional Apollonian packing.

%H Nicolas Hannachi, <a href="/A261409/a261409.png">Illustration of this packing, showing some of the initial terms</a> [Fig. 2b in Kontorovich (2012), used with permission]

%H Nicolas Hannachi, <a href="http://maths.ac-noumea.nc/polyhedr/packing.htm">Des cercles tangents et des sphères tangentes</a>

%H Alex Kontorovich, <a href="http://arxiv.org/abs/1208.5441">The local-global principle for integral Soddy sphere packings</a>, arXiv:1208.5441, 2012.

%Y Cf. A261410.

%K sign,more

%O 1,1

%A _N. J. A. Sloane_, Aug 23 2015