A344172 - OEIS

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

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OFFSET

2,2

COMMENTS

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

LINKS

Table of n, a(n) for n=2..94.

Wikipedia, Rhombic triacontahedron

EXAMPLE

12.310734148701013610281...

MATHEMATICA

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