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A222074 Decimal expansion of (1/1920)*Pi^5. 12
1, 5, 9, 3, 8, 5, 2, 5, 2, 4, 9, 2, 3, 3, 4, 0, 9, 0, 2, 4, 1, 0, 1, 1, 0, 9, 8, 9, 8, 0, 9, 5, 6, 0, 4, 5, 0, 4, 1, 8, 2, 3, 2, 8, 4, 7, 0, 2, 1, 2, 2, 3, 9, 0, 9, 1, 3, 2, 7, 7, 3, 1, 4, 4, 1, 9, 9, 1, 4, 0, 5, 8, 4, 0, 2, 9, 2, 3, 9, 7, 1, 0, 8, 6, 3, 4, 5, 5, 7, 3, 1, 6, 3, 2, 8, 3, 9, 1, 6 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Conjectured to be density of densest packing of equal spheres in 16 dimensions (achieved for example by the Barnes-Wall BW_16 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), 383-403.

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..98.

G. Nebe and N. J. A. Sloane, Home page for DBW_16 lattice

N. J. A. Sloane, Table of maximal density of a packing of equal spheres in n-dimensional Euclidean space (for n>3 the values are only conjectural).

EXAMPLE

.15938525249233409024101109898095604504182328470212239091327...

MATHEMATICA

RealDigits[Pi^5/1920, 10, 120][[1]] (* Harvey P. Dale, Oct 03 2013 *)

PROG

(PARI) Pi^5/1920 \\ Charles R Greathouse IV, Oct 31 2014

CROSSREFS

Related constants: A020769, A020789, A093766, A093825, A222066, A222067, A222068, A222069, A222070, A222071, A222072, A222073, A222075.

Sequence in context: A154265 A198133 A111453 * A245735 A303497 A198990

Adjacent sequences:  A222071 A222072 A222073 * A222075 A222076 A222077

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane, Feb 10 2013

STATUS

approved

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Last modified June 5 12:47 EDT 2020. Contains 334840 sequences. (Running on oeis4.)