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 A200257 Decimal expansion of the circumradius R of cyclic pentagon with sides 2, 3, 5, 7, and 11. 3
 5, 5, 0, 6, 2, 9, 9, 6, 3, 8, 6, 6, 8, 1, 3, 1, 8, 1, 9, 8, 8, 4, 3, 9, 5, 0, 6, 3, 3, 1, 3, 1, 8, 8, 1, 6, 6, 3, 2, 5, 3, 5, 3, 9, 0, 5, 5, 1, 8, 2, 7, 9, 2, 0, 0, 0, 3, 9, 6, 8, 0, 3, 8, 8, 6, 5, 0, 1, 1, 9, 7, 7, 6, 2, 9, 3, 6, 2, 9, 1, 1, 1, 8, 8, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Note that for cyclic polygon R does not depend on order of sides. LINKS Ralph H. Buchholz and James A. MacDougall, Cyclic polygons with rational Sides and Area, Journal of Number Theory, Volume 128, Issue 1, January 2008, Pages 17-48. Zak Seidov, Figure showing polygon EXAMPLE R = 5.5062996386681... MATHEMATICA nn=5; L=Sum[Prime[n], {n, nn}]; RealDigits[Re[FindRoot[Sum[ArcSin[Prime[n]/2/R], {n, nn}] == Pi, {R, L/2/Pi}][[1, 2]]]] CROSSREFS Sequence in context: A065936 A299625 A021649 * A236023 A200516 A233383 Adjacent sequences:  A200254 A200255 A200256 * A200258 A200259 A200260 KEYWORD nonn,cons AUTHOR Zak Seidov, Nov 15 2011 STATUS approved

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Last modified August 3 20:43 EDT 2021. Contains 346441 sequences. (Running on oeis4.)