A377341 Decimal expansion of the surface area of a truncated octahedron with unit edge length.

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

Offset

2,1

Links

Table of n, a(n) for n=2..91.

Polytope Wiki, Truncated octahedron.

Eric Weisstein's World of Mathematics, Truncated Octahedron.

Wikipedia, Truncated octahedron.

Index entries for algebraic numbers, degree 2.

Formula

Equals 6 + 12*sqrt(3) = 6 + 12*A002194.

Minimal polynomial: x^2 - 12*x - 396. - Amiram Eldar, Jun 10 2026

Example

26.78460969082652752232935609807046840331366304572...

Mathematica

First[RealDigits[6 + 12*Sqrt[3], 10, 100]]
(* Alternative: *)
First[RealDigits[PolyhedronData["TruncatedOctahedron", "SurfaceArea"], 10, 100]]

Crossrefs

Cf. A377342 (volume), A020797 (circumradius/10), A152623 (midradius).

Cf. A010469 (analogous for a regular octahedron).

Cf. A002194.

Sequence in context: A387191 A176017 A140132 * A186504 A096909 A073005

Adjacent sequences: A377338 A377339 A377340 * A377342 A377343 A377344

Keyword

nonn,cons,easy

Author

Paolo Xausa, Oct 25 2024

Status

approved