A344212 Decimal expansion of 1 + 1/sqrt(5).

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

Offset

1,2

Comments

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

Essentially the same sequence of digits as A176453, A134974, A020762 and A010476. - R. J. Mathar, May 16 2021

Links

Table of n, a(n) for n=1..93.

Wikipedia, Rhombic triacontahedron

Example

1.4472135954999579392818...

Mathematica

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

Crossrefs

Cf. A019952 (rhombic triacontahedron inscribed sphere radius).

Cf. A344171 (rhombic triacontahedron surface area).

Cf. A344172 (rhombic triacontahedron volume).

Cf. A010476, A020762.

Sequence in context: A196463 A021695 A131844 * A010476 A020762 A204158

Adjacent sequences: A344209 A344210 A344211 * A344213 A344214 A344215

Keyword

nonn,cons

Author

Wesley Ivan Hurt, May 11 2021

Status

approved