A005869 - OEIS

A005869

Theta series of b.c.c. lattice with respect to short edge.
(Formerly M1561)

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-François Alcover, Jul 05 2017, after Michael Somos *)

CROSSREFS