A391952 Decimal expansion of the surface area of an Escher's solid with unit shorter edge length.

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

Offset

2,1

Comments

See A391951 for more information and links.

Links

Paolo Xausa, Table of n, a(n) for n = 2..10000

Formula

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

Example

22.627416997969520780827019587355169257114750006031...

Mathematica

First[RealDigits[Sqrt[512], 10, 100]] (* or *)
First[RealDigits[PolyhedronData["EscherSolid", "SurfaceArea"], 10, 100]]

Crossrefs

Cf. A391951 (volume).

Cf. A002193, A391654.

Sequence in context: A221438 A327991 A389460 * A193322 A165460 A242649

Adjacent sequences: A391949 A391950 A391951 * A391953 A391954 A391955

Keyword

nonn,cons,easy

Author

Paolo Xausa, Dec 24 2025

Status

approved