OFFSET
2,1
LINKS
Eric Weisstein's World of Mathematics, Freeth's Nephroid
EXAMPLE
21.203405907484721020...
MAPLE
evalf((8*(3*EllipticE(sqrt(2/3)) - 3*EllipticK(sqrt(2/3)) + 4*EllipticPi(-1/3, sqrt(2/3))))/sqrt(3), 120); # Vaclav Kotesovec, Apr 22 2015
MATHEMATICA
(8*(3*EllipticE[2/3] - 3*EllipticK[2/3] + 4*EllipticPi[ -1/3, 2/3]))/Sqrt[3]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Mar 20 2008
STATUS
approved