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 A272031 Decimal expansion of the Hausdorff dimension of the Heighway-Harter dragon curve boundary. 1
 1, 5, 2, 3, 6, 2, 7, 0, 8, 6, 2, 0, 2, 4, 9, 2, 1, 0, 6, 2, 7, 7, 6, 8, 3, 9, 3, 5, 9, 5, 4, 2, 1, 6, 6, 2, 7, 2, 8, 4, 9, 3, 6, 3, 8, 3, 4, 0, 1, 1, 9, 3, 4, 7, 8, 1, 3, 8, 6, 9, 0, 9, 0, 9, 4, 5, 7, 9, 2, 1, 6, 6, 2, 8, 9, 5, 8, 8, 4, 1, 0, 6, 8, 9, 2, 6, 6, 4, 2, 2, 7, 4, 6, 4, 7, 1, 3, 9, 4, 2, 8, 1, 1, 2, 4 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The value for 'twindragon' is the same. LINKS Stanislav Sykora, Table of n, a(n) for n = 1..2000 Angel Chang, Tianrong Zhang, On the Fractal Structure of the Boundary of Dragon Curve Eric Weisstein's World of Mathematics, Dragon curve Wikipedia, Dragon curve Wikipedia, List of fractals by Hausdorff dimension FORMULA Equals log_2((1+(73+6*sqrt(87))^(1/3)+(73-6*sqrt(87))^(1/3))/3). EXAMPLE 1.5236270862024921062776839359542166272849363834011934781386909094... PROG (PARI) log((1+(73+6*sqrt(87))^(1/3)+(73-6*sqrt(87))^(1/3))/3)/log(2) CROSSREFS Cf. A014577. Sequence in context: A021195 A019673 A229780 * A090183 A063572 A205294 Adjacent sequences:  A272028 A272029 A272030 * A272032 A272033 A272034 KEYWORD nonn,cons AUTHOR Stanislav Sykora, Apr 18 2016 STATUS approved

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