A371923 Lateral surface area of a right circular conoid with unit height and base radius.

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

Offset

1,1

Links

Table of n, a(n) for n=1..80.

Eric Weisstein's World of Mathematics, Right Circular Conoid

Example

6.02721253454...

Mathematica

RealDigits[Pi HypergeometricPFQ[{-1/2, 1/4, 3/4}, {1/2, 1}, -1] - NIntegrate[(Sqrt[u] (1 + u) ArcTanh[Sqrt[(1 - u)/(1 + u^2)]])/(u - 1), {u, 0, 1}, WorkingPrecision -> 250, PrecisionGoal -> 120]][[1]]

Crossrefs

Sequence in context: A329093 A195406 A021628 * A201331 A366349 A075092

Adjacent sequences: A371920 A371921 A371922 * A371924 A371925 A371926

Keyword

nonn,cons

Author

Eric W. Weisstein, Apr 12 2024

Status

approved