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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 G. Nebe and N. J. A. Sloane, Home page for DBW_16 lattice 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 May 11 03:49 EDT 2021. Contains 343784 sequences. (Running on oeis4.)