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A261409
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Curvatures in a certain bounded, integral, primitive Soddy sphere packing.
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2
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-11, 21, 25, 27, 28, 34, 36, 40, 42, 43, 46, 48, 49, 51, 54, 57, 61, 63, 64, 67, 69, 70, 72, 73, 75, 78, 79, 81, 82, 84, 85
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OFFSET
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1,1
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COMMENTS
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A three-dimensional Apollonian packing.
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LINKS
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Table of n, a(n) for n=1..31.
Nicolas Hannachi, Illustration of this packing, showing some of the initial terms [Fig. 2b in Kontorovich (2012), used with permission]
Nicolas Hannachi, Des cercles tangents et des sphères tangentes
Alex Kontorovich, The local-global principle for integral Soddy sphere packings, arXiv:1208.5441, 2012.
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CROSSREFS
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Cf. A261410.
Sequence in context: A360372 A350766 A189226 * A195100 A125164 A101223
Adjacent sequences: A261406 A261407 A261408 * A261410 A261411 A261412
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KEYWORD
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sign,more
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AUTHOR
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N. J. A. Sloane, Aug 23 2015
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STATUS
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approved
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