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 A178817 Decimal expansion of the area of the regular 7-gon (heptagon) of edge length 1. 10
 3, 6, 3, 3, 9, 1, 2, 4, 4, 4, 0, 0, 1, 5, 8, 8, 9, 9, 2, 5, 3, 6, 1, 9, 3, 0, 0, 7, 6, 0, 0, 2, 2, 0, 5, 7, 8, 7, 3, 5, 0, 1, 0, 3, 6, 1, 5, 9, 5, 4, 4, 4, 9, 1, 7, 1, 4, 5, 9, 8, 0, 4, 0, 9, 5, 1, 0, 2, 9, 9, 8, 5, 2, 3, 6, 3, 0, 4, 6, 0, 0, 5, 5, 6, 2, 7, 3, 0, 7, 1, 5, 2, 9, 5, 8, 1, 0, 8, 9, 4, 3, 7, 1, 0, 4 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS G. C. Greubel, Table of n, a(n) for n = 1..10000 Wikipedia, Heptagon Wikipedia, Regular polygon FORMULA Digits of (7/4) * cot(Pi/7). EXAMPLE 3.63391244400158899253619300760022057873501036159544491714598040951029... MAPLE evalf[120]((7/4)*cot(Pi/7)); # Muniru A Asiru, Jan 22 2019 MATHEMATICA RealDigits[7*Cot[Pi/7]/4, 10, 100][[1]] PROG (PARI) p=7; a=(p/4)*cotan(Pi/p)  \\ Set realprecision in excess. - Stanislav Sykora, Apr 12 2015 (MAGMA) SetDefaultRealField(RealField(100)); R:=RealField(); 7*Cot(Pi(R)/7)/4; // G. C. Greubel, Jan 22 2019 (Sage) numerical_approx(7*cot(pi/7)/4, digits=100) # G. C. Greubel, Jan 22 2019 CROSSREFS Cf. A178818. Cf. Areas of other regular polygons: A120011, A102771, A104956, A090488, A256853, A178816, A256854, A178809. Sequence in context: A256158 A123060 A204931 * A275363 A155503 A010619 Adjacent sequences:  A178814 A178815 A178816 * A178818 A178819 A178820 KEYWORD nonn,cons,easy AUTHOR Vladimir Joseph Stephan Orlovsky, Jun 16 2010 STATUS approved

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Last modified February 23 21:20 EST 2020. Contains 332195 sequences. (Running on oeis4.)