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A005885 Theta series of f.c.c. lattice with respect to triangle.
(Formerly M2214)
1
3, 1, 3, 3, 6, 3, 6, 1, 9, 0, 12, 3, 6, 6, 12, 3, 6, 3, 12, 6, 12, 6, 12, 3, 15, 0, 9, 6, 18, 6, 18, 1, 12, 6, 12, 9, 18, 6, 18, 0, 18, 0, 12, 12, 18, 12, 12, 3, 21, 7, 24, 6, 18, 9, 12, 6, 18, 0, 24, 12, 18, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

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

Table of n, a(n) for n=0..61.

Index entries for sequences related to f.c.c. lattice

CROSSREFS

Sequence in context: A078555 A259286 A087891 * A205145 A061892 A038573

Adjacent sequences:  A005882 A005883 A005884 * A005886 A005887 A005888

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 17 17:59 EST 2020. Contains 331999 sequences. (Running on oeis4.)