A380981 Decimal expansion of the medium/short edge length ratio of a disdyakis triacontahedron.

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

Offset: 1

Author

Paolo Xausa, Feb 10 2025

Keywords

• nonn
• cons
• easy

Examples

			1.57082039324993690892275210061938287063218550788...
		

Links

• Paolo Xausa, Table of n, a(n) for n = 1..10000
• Eric Weisstein's World of Mathematics, Disdyakis Triacontahedron.
• Wikipedia, Disdyakis triacontahedron.

Crossrefs

Cf. A380982 (long/short edge length ratio).

Cf. A002163, A379388, A379708, A379709, A379710, A379711, A380940, A380941, A380942.

Apart from leading digits the same as A176015, A134976 and A010499.

Programs

Mathematica

First[RealDigits[3/10*(3 + Sqrt[5]), 10, 100]]

Formula

Equals (3/10)*(3 + sqrt(5)) = (3/10)*(3 + A002163).

Equals A176015 + 2/5.