OFFSET
0,1
COMMENTS
Distance between points in the most spread-out hexagonal lattice such that the gap formed by any three mutually tangential unit disks contains a point inside or on its boundary.
Side-length of an equilateral triangle contained in a unit side-length equilateral triangle such that every vertex and midpoint of the smaller triangle is at distance 1/2 from the nearest vertex of the larger triangle.
A quartic number with denominator 2. Minimal polynomial is 4x^4 - 14x^2 + 1. - Charles R Greathouse IV, Sep 29 2022
LINKS
EXAMPLE
0.2700907567377264536...
MATHEMATICA
First[RealDigits[N[(3-Sqrt[5])/(2Sqrt[2]), 89]]] (* Stefano Spezia, Aug 08 2022 *)
PROG
(PARI) (3-sqrt(5))/sqrt(8) \\ Charles R Greathouse IV, Sep 29 2022
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Andrew Slattery, Aug 08 2022
EXTENSIONS
More terms from Stefano Spezia, Aug 08 2022
STATUS
approved