%I #14 Nov 11 2019 22:16:12
%S 7,6,2,3,8,7,0,5,5,5,0,6,7,7,3,8,7,4,4,9,8,4,0,2,6,8,2,1,5,8,8,4,9,2,
%T 2,6,0,9,6,3,2,1,4,2,1,2,8,0,9,2,8,2,7,9,8,6,9,1,4,9,8,4,9,6,3,4,6,9,
%U 4,8,3,7,5,1,0,8,7,0,7,2,1,3,2,8,9,4,8
%N Decimal expansion of edge length of a regular pentagon with area 1.
%F Equals sqrt(1/A102771) = 2/(25 + 10*sqrt(5))^(1/4).
%e 0.7623870555067738744984026821...
%t RealDigits[(2)/(25 + 10*Sqrt[5])^(1/4), 10, 100][[1]] (* _Metin Sariyar_, Oct 26 2019 *)
%o (PARI) default(realprecision, 110); 2/(25 + 10*sqrt(5))^(1/4)
%Y Cf. A102771, A154605 (the edge length of an equilateral triangle).
%K cons,nonn
%O 0,1
%A _Jinyuan Wang_, Oct 26 2019
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