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%I #11 May 16 2021 12:21:05
%S 1,4,4,7,2,1,3,5,9,5,4,9,9,9,5,7,9,3,9,2,8,1,8,3,4,7,3,3,7,4,6,2,5,5,
%T 2,4,7,0,8,8,1,2,3,6,7,1,9,2,2,3,0,5,1,4,4,8,5,4,1,7,9,4,4,9,0,8,2,1,
%U 0,4,1,8,5,1,2,7,5,6,0,9,7,9,8,8,2,8,8,2,8,8,1,6,7
%N Decimal expansion of 1 + 1/sqrt(5).
%C Decimal expansion of the midradius of a rhombic triacontahedron with unit edge length.
%C Essentially the same sequence of digits as A176453, A134974, A020762 and A010476. - _R. J. Mathar_, May 16 2021
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Rhombic_triacontahedron">Rhombic triacontahedron</a>
%e 1.4472135954999579392818...
%t RealDigits[1 + 1/Sqrt[5], 10, 100][[1]] // Flatten
%Y Cf. A019952 (rhombic triacontahedron inscribed sphere radius).
%Y Cf. A344171 (rhombic triacontahedron surface area).
%Y Cf. A344172 (rhombic triacontahedron volume).
%Y Cf. A010476, A020762.
%K nonn,cons
%O 1,2
%A _Wesley Ivan Hurt_, May 11 2021
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