A396707 Decimal expansion of a spherical cap height divided by sphere radius, the cap volume being 1/6 of the sphere volume.

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

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 3*x^3-9*x^2+2.

Example

0.518298029488629354...

Mathematica

First[RealDigits[Root[3*#^3 - 9*#^2 + 2 &, 2], 10, 100]] (* Paolo Xausa, Jun 03 2026 *)

Crossrefs

Cf. A000007 (ratio 1/2), A220052 (ratio 1/3), A178959 (ratio 1/4), A396706 (ratio 1/5).

Sequence in context: A347955 A349133 A347131 * A350515 A073116 A201525

Adjacent sequences: A396704 A396705 A396706 * A396711 A396712 A396713

Keyword

nonn,cons

Author

R. J. Mathar, Jun 03 2026

Status

approved