A394832 Decimal expansion of the mean distance between two points selected independently and uniformly at random from a unit disk, one from each of the two sides of a given diameter.

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

Offset

1,4

Links

Table of n, a(n) for n=1..105.

Enoch Beery Seitz, Problem 29, The Mathematical Visitor, Vol. 1, No. 1 (1878), p. 5; Solution to Problem 29, by the proposer, ibid., pp. 31-32.

Index entries for transcendental numbers.

Formula

Equals 1472/(135*Pi^2).

Equals 2*A093070 - A130203.

Example

1.10477616534460147826215236922014136642382308383368...

Mathematica

RealDigits[1472/(135*Pi^2), 10, 120][[1]]

Prog

(PARI) 1472/(135*Pi^2)

Crossrefs

Cf. A093070, A130203, A258147, A394833.

Sequence in context: A275639 A201940 A075113 * A197739 A277577 A388541

Adjacent sequences: A394829 A394830 A394831 * A394833 A394834 A394835

Keyword

nonn,cons

Author

Amiram Eldar, Apr 04 2026

Status

approved