OFFSET
1,1
COMMENTS
Corresponds to the minimal height-to-diameter ratio of a cylinder such that seven of them may be placed in mutual contact.
REFERENCES
M. Gardner, The Scientific American book of Mathematical Puzzles & Diversions, pp. 115 Simon & Shuster NY 1959 (or Hexaflexagons And Other Mathematical Diversions, The Univ. of Chicago Press Chicago IL 1988).
EXAMPLE
7*sqrt(3)/2=6.0621778264910705273460621952705532842998183883363...
MATHEMATICA
RealDigits[7Sqrt[3]/2, 10, 105][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Lekraj Beedassy, Sep 21 2004
EXTENSIONS
Corrected and extended by Rick L. Shepherd and Ray Chandler, Sep 21 2004
STATUS
approved