

A222071


Decimal expansion of (1/105)*Pi^3.


13



2, 9, 5, 2, 9, 7, 8, 7, 3, 1, 4, 5, 7, 1, 2, 5, 7, 3, 0, 9, 9, 7, 7, 4, 4, 2, 9, 2, 1, 0, 4, 8, 9, 4, 7, 8, 1, 1, 6, 4, 3, 1, 3, 1, 9, 6, 7, 5, 0, 9, 6, 2, 6, 3, 7, 5, 3, 7, 5, 7, 5, 0, 5, 7, 5, 0, 5, 3, 7, 0, 9, 4, 4, 5, 2, 0, 5, 4, 3, 4, 3, 2, 1, 4, 9, 2, 0, 9, 6, 2, 2, 1, 5, 2, 6, 5, 5, 8
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OFFSET

0,1


COMMENTS

Conjectured to be density of densest packing of equal spheres in 7 dimensions (achieved for example by the E_7 lattice).


REFERENCES

J. H. Conway and N. J. A. Sloane, What are all the best sphere packings in low dimensions?, Discr. Comp. Geom., 13 (1995), 383403.
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer, 3rd. ed., 1998. See p. xix.


LINKS

Table of n, a(n) for n=0..97.
G. Nebe and N. J. A. Sloane, Home page for E_7 lattice
N. J. A. Sloane, Table of maximal density of a packing of equal spheres in ndimensional Euclidean space (for n>3 the values are only conjectural).


EXAMPLE

.295297873145712573099774429210489478116431319675...


PROG

(PARI) Pi^3/105 \\ Charles R Greathouse IV, Oct 31 2014


CROSSREFS

Related constants: A020769, A020789, A093766, A093825, A222066, A222067, A222068, A222069, A222070, A222072, A222073, A222074, A222075.
Sequence in context: A076930 A011068 A078149 * A160208 A248364 A021776
Adjacent sequences: A222068 A222069 A222070 * A222072 A222073 A222074


KEYWORD

nonn,cons


AUTHOR

N. J. A. Sloane, Feb 10 2013


STATUS

approved



