A377276 -id:A377276 - cp's OEIS frontend

A377275 Decimal expansion of the volume of a truncated tetrahedron with unit edge length.

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

Offset: 1

Paolo Xausa, Oct 23 2024

			2.7105759945484321768699033880685879839252044278...

Eric Weisstein's World of Mathematics, Truncated Tetrahedron.
Wikipedia, Truncated tetrahedron.

Cf. A377274 (surface area), A377276 (circumradius), A093577 (midradius), A377277 (Dehn invariant).
Cf. A020829 (analogous for a regular tetrahedron).
Cf. A002193.

First[RealDigits[23/12*Sqrt[2], 10, 100]] (* or *)
First[RealDigits[PolyhedronData["TruncatedTetrahedron", "Volume"], 10, 100]]

Equals (23/12)*sqrt(2) = (23/12)*A002193.

A377274 Decimal expansion of the surface area of a truncated tetrahedron with unit edge length.

Original entry on oeis.org

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

Offset: 2

Paolo Xausa, Oct 23 2024

			12.12435565298214105469212439054110656859963677667...

Eric Weisstein's World of Mathematics, Truncated Tetrahedron.
Wikipedia, Truncated tetrahedron.

Cf. A377275 (volume), A377276 (circumradius), A093577 (midradius), A377277 (Dehn invariant).

Cf. A002194 (analogous for a regular tetrahedron).

First[RealDigits[7*Sqrt[3], 10, 100]] (* or *)
First[RealDigits[PolyhedronData["TruncatedTetrahedron", "SurfaceArea"], 10, 100]]

Equals 7*sqrt(3) = 7*A002194.

cp's OEIS Frontend

A377275 Decimal expansion of the volume of a truncated tetrahedron with unit edge length.

Views

Author

Keywords

Examples

Links

Crossrefs

Programs

Mathematica

Formula