A380982 Decimal expansion of the long/short edge length ratio of a disdyakis triacontahedron.

1, 8, 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

Offset: 1

Author

Paolo Xausa, Feb 10 2025

Keywords

• nonn
• cons
• easy

Examples

			1.8472135954999579392818347337462552470881236719223...
		

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. A380981 (medium/short edge length ratio).

Cf. A020762, A379388, A379708, A379709, A379710, A379711, A380940, A380941, A380942.

Apart from leading digits the same as A176453, A134974 and A010476.

Programs

Mathematica

First[RealDigits[7/5 + 1/Sqrt[5], 10, 100]] (* Paolo Xausa, Feb 10 2025 *)

Formula

Equals 1/sqrt(5) + 7/5 = A020762 + 7/5.