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 A118472 Decimal expansion of Freiman's constant. 0
 4, 5, 2, 7, 8, 2, 9, 5, 6, 6, 1, 6, 0, 8, 7, 9, 1, 4, 0, 8, 8, 2, 6, 9, 5, 9, 8, 8, 0, 7, 0, 4, 6, 9, 6, 4, 6, 9, 2, 9, 8, 3, 3, 6, 3, 2, 7, 6, 9, 7, 2, 8, 3, 7, 4, 0, 6, 5, 0, 6, 1, 7, 9, 2, 0, 0, 9, 8, 6, 2, 9, 8, 3, 4, 1, 3, 1, 3, 5, 4, 2, 7, 3, 2, 3, 0, 8, 6, 1, 5, 0, 7, 1, 7, 0, 7, 0, 9, 5, 1, 5, 2, 0, 4, 1 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES J. H. Conway and R. K. Guy, The Book of Numbers, Copernicus Press, NY, 1996, pp. 188-189. S. R. Finch, Mathematical Constants, Cambridge, 2003, Section 2.31. Julian Havil, The Irrationals, Princeton University Press, Princeton and Oxford, 2012, p. 175. LINKS Oleg Karpenkov, Matty van-Son, Generalised Markov numbers, arXiv:1809.01688 [math.NT], 2018, p. 3. J. Parkkonen, F. Paulin, Prescribing the behaviour of geodesics in negative curvature, Geom. Topol. 14 (2010) 277-392 Eric Weisstein's World of Mathematics, Freiman's Constant. Wikipedia, Markov spectrum FORMULA The constant is (2221564096 + 283748*sqrt(462))/491993569 = 4 + (253589820 + 283748*sqrt(462))/491993569. See the programs and the references. - Wolfdieter Lang, May 29 2018 EXAMPLE 4.52782956616087914088269598807046964692983363276972837406506179200... MATHEMATICA RealDigits[(2221564096 + 283748Sqrt@462)/491993569, 10, 111][[1]] - Robert G. Wilson v, May 04 2006 PROG (PARI) (2221564096 + 283748*sqrt(462))/491993569 \\ Charles R Greathouse IV, Oct 31 2014 CROSSREFS Sequence in context: A178040 A090201 A130144 * A194880 A111624 A019815 Adjacent sequences:  A118469 A118470 A118471 * A118473 A118474 A118475 KEYWORD nonn,cons AUTHOR Philippe Deléham, May 04 2006 EXTENSIONS More terms from Robert G. Wilson v, May 04 2006 STATUS approved

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Last modified October 23 22:15 EDT 2019. Contains 328373 sequences. (Running on oeis4.)