A377795 Decimal expansion of the midradius of a (small) rhombicosidodecahedron with unit edge length.
2, 1, 7, 6, 2, 5, 0, 8, 9, 9, 4, 8, 2, 8, 2, 1, 5, 1, 1, 1, 0, 0, 0, 5, 2, 8, 6, 5, 9, 9, 7, 7, 6, 7, 8, 8, 0, 1, 9, 8, 0, 7, 3, 1, 9, 1, 5, 8, 9, 3, 2, 9, 9, 4, 7, 2, 3, 0, 1, 0, 1, 7, 4, 5, 9, 2, 4, 8, 3, 3, 2, 0, 0, 9, 7, 2, 0, 7, 6, 8, 0, 9, 5, 0, 7, 6, 7, 9, 1, 8
Offset: 1
Examples
2.1762508994828215111000528659977678801980731915893...
Links
- Eric Weisstein's World of Mathematics, Small Rhombicosidodecahedron.
- Wikipedia, Rhombicosidodecahedron.
Crossrefs
Programs
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Mathematica
First[RealDigits[Sqrt[5/2 + Sqrt[5]], 10, 100]] (* or *) First[RealDigits[PolyhedronData["Rhombicosidodecahedron", "Midradius"], 10, 100]]
Formula
Equals sqrt(5/2 + sqrt(5)) = sqrt(5/2 + A002163).