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A005871 Theta series of hexagonal close-packing with respect to edge within layer.
(Formerly M0007)
2
0, 0, 0, 2, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 2, 0, 4, 0, 0, 0, 8, 0, 4, 0, 0, 0, 4, 0, 0, 0, 0, 0, 4, 0, 8, 0, 0, 0, 10, 0, 4, 0, 0, 0, 4, 0, 0, 0, 0, 0, 4, 0, 8, 0, 2, 0, 6, 0, 0, 0, 4, 0, 6, 0, 0, 0, 4, 0, 4, 0, 8, 0, 4, 0, 4, 0, 8, 0, 2, 0, 8, 0, 0, 0, 4, 0, 4, 0, 4, 0, 4, 0, 8, 0, 4, 0, 4, 0, 8, 0, 0, 0, 6, 0, 0, 0, 8, 0, 0, 0, 6, 0, 4, 0, 4, 0, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

N. J. A. Sloane and B. K. Teo, Theta series and magic numbers for close-packed spherical clusters, J. Chem. Phys. 83 (1985) 6520-6534.

LINKS

Sean A. Irvine, Table of n, a(n) for n = 0..999

CROSSREFS

Sequence in context: A028833 A024943 A005929 * A005888 A213902 A170770

Adjacent sequences:  A005868 A005869 A005870 * A005872 A005873 A005874

KEYWORD

easy,nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Sep 23 2016

STATUS

approved

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Last modified January 18 23:05 EST 2019. Contains 319282 sequences. (Running on oeis4.)