A344172 Decimal expansion of 4*sqrt(5 + 2*sqrt(5)).

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

Offset: 2

Author

Wesley Ivan Hurt, May 10 2021

Keywords

• nonn
• cons

Comments

Decimal expansion of the volume of a rhombic triacontahedron with unit edge length.

Examples

			12.310734148701013610281...
		

Links

• Wikipedia, Rhombic triacontahedron

Crossrefs

Cf. A344171 (rhombic triacontahedron surface area).

Cf. A344212 (rhombic triacontahedron midradius).

Cf. A019952 (rhombic triacontahedron radius of inscribed sphere).

Programs

Mathematica

RealDigits[4 Sqrt[5 + 2 Sqrt[5]], 10, 100][[1]] // Flatten