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A005869 Theta series of b.c.c. lattice with respect to short edge.
(Formerly M1561)
5
2, 6, 6, 8, 12, 6, 12, 18, 6, 14, 18, 12, 18, 18, 12, 12, 30, 18, 14, 24, 6, 30, 30, 12, 24, 24, 18, 24, 30, 12, 26, 42, 24, 12, 30, 18, 24, 48, 18, 36, 24, 18, 36, 30, 24, 26, 48, 18, 30, 48, 12, 36, 54, 12, 24, 30, 36, 48, 42, 30, 24, 54, 18, 26, 36, 30, 54, 54, 18, 24 (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).

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

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.

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

MATHEMATICA

QP = QPochhammer; CoefficientList[2*(QP[q^2]^2/QP[q])^3 + O[q]^70, q] (* Jean-Fran├žois Alcover, Jul 05 2017, after Michael Somos *)

CROSSREFS

Cf. A008443. Equals A005886/2. Cf. A121055.

Sequence in context: A157299 A230292 A082911 * A021978 A141377 A006955

Adjacent sequences:  A005866 A005867 A005868 * A005870 A005871 A005872

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 20 02:35 EDT 2019. Contains 328244 sequences. (Running on oeis4.)