A381687 Decimal expansion of the isoperimetric quotient of a truncated octahedron.

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

Offset

0,1

Comments

For the definition of isoperimetric quotient of a solid, references and links, see A381684.

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Index entries for transcendental numbers

Formula

Equals 36*Pi*A377342^2/(A377341^3).

Equals 64*Pi/(3*(1 + 2*sqrt(3))^3) = 64*A000796/(3*(1 + A010469)^3).

Example

0.753366625166156882229489414578751361927704595866...

Mathematica

First[RealDigits[64*Pi/(3*(1 + 2*Sqrt[3])^3), 10, 100]]

Crossrefs

Cf. A377341 (surface area), A377342 (volume).

Cf. A000796, A010469, A381684.

Sequence in context: A360895 A335985 A093824 * A203142 A176974 A198983

Adjacent sequences: A381684 A381685 A381686 * A381688 A381689 A381690

Keyword

nonn,cons,easy

Author

Paolo Xausa, Mar 04 2025

Status

approved