A396706 Decimal expansion of spherical cap height divided by sphere radius, the cap volume being 1/5 of the sphere volume.

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

Offset

0,1

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Index entries for algebraic numbers, degree 3.

Formula

Minimal polynomial 5*x^3-15*x^2+4.

Example

0.574281450..

Mathematica

First[RealDigits[Root[5*#^3 - 15*#^2 + 4 &, 2], 10, 100]] (* Paolo Xausa, Jun 03 2026 *)

Crossrefs

Cf. A000007 (ratio 1/2), A220052 (ratio 1/3), A178959 (ratio 1/4), A396707 (ratio 1/6).

Sequence in context: A258162 A021868 A243395 * A389070 A245655 A011497

Adjacent sequences: A396695 A396704 A396705 * A396707 A396711 A396712

Keyword

nonn,cons

Author

R. J. Mathar, Jun 03 2026

Status

approved