OFFSET
1,1
COMMENTS
The arc length for general value of "a" is 4.917...*a.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Folium of Descartes.
Wikipedia, Folium of Descartes.
EXAMPLE
4.91748872168153350993...
MATHEMATICA
RealDigits[3*N[Integrate[Sqrt[1+x^2(4-4x-4x^3+4x^4+x^6)]/(1+x^3)^2, {x, 0, Infinity}], 100], 10][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Amiram Eldar, Nov 26 2017
STATUS
approved