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A174423 Number of "iterative" n x n adjacency matrices of sphere packings in R^3. 2
1, 1, 1, 1, 1, 3, 26, 437, 13823, 750226 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

See reference for precise definition.

LINKS

Table of n, a(n) for n=1..10.

Natalie Arkus, Vinothan N. Manoharan, Michael P. Brenner. Deriving Finite Sphere Packings, Nov 24, 2010.

CROSSREFS

Cf. A173715, A174424.

Sequence in context: A305113 A251664 A182958 * A321183 A274778 A049088

Adjacent sequences:  A174420 A174421 A174422 * A174424 A174425 A174426

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 27 2010

STATUS

approved

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Last modified July 29 11:53 EDT 2021. Contains 346346 sequences. (Running on oeis4.)