A391952 - OEIS

%I #7 Dec 25 2025 09:37:35

%S 2,2,6,2,7,4,1,6,9,9,7,9,6,9,5,2,0,7,8,0,8,2,7,0,1,9,5,8,7,3,5,5,1,6,

%T 9,2,5,7,1,1,4,7,5,0,0,0,6,0,3,1,1,6,9,1,7,0,8,2,6,8,7,5,8,0,7,8,5,1,

%U 7,1,9,6,5,5,3,9,3,7,1,2,6,2,1,6,0,6,2,0,0,5

%N Decimal expansion of the surface area of an Escher's solid with unit shorter edge length.

%C See A391951 for more information and links.

%H Paolo Xausa, <a href="/A391952/b391952.txt">Table of n, a(n) for n = 2..10000</a>

%F Equals 16*sqrt(2) = 16*A002193 = sqrt(512).

%e 22.627416997969520780827019587355169257114750006031...

%t First[RealDigits[Sqrt[512], 10, 100]] (* or *)

%t First[RealDigits[PolyhedronData["EscherSolid", "SurfaceArea"], 10, 100]]

%Y Cf. A391951 (volume).

%Y Cf. A002193, A391654.

%K nonn,cons,easy

%O 2,1

%A _Paolo Xausa_, Dec 24 2025