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A138498 Decimal expansion of arc length of Freeth's nephroid. 0
2, 1, 2, 0, 3, 4, 0, 5, 9, 0, 7, 4, 8, 4, 7, 2, 1, 0, 2, 0, 6, 6, 0, 9, 5, 8, 3, 7, 4, 4, 3, 0, 8, 2, 7, 1, 8, 8, 2, 2, 5, 5, 2, 2, 0, 1, 5, 5, 9, 5, 3, 9, 5, 9, 6, 3, 2, 5, 9, 2, 1, 8, 3, 0, 2, 7, 2, 4, 1, 9, 5, 2, 7, 8, 5, 0, 9, 2, 6, 8, 9, 7, 4, 7, 5, 4, 4, 5, 8, 1, 1, 6, 4, 7, 4, 1, 1, 9, 8, 3, 9, 5, 8, 6, 5 (list; constant; graph; refs; listen; history; internal format)
OFFSET

2,1

LINKS

Eric Weisstein's World of Mathematics, Freeth's Nephroid

EXAMPLE

21.203405907484721020...

MATHEMATICA

(8*(3*EllipticE[2/3] - 3*EllipticK[2/3] + 4*EllipticPi[ -1/3, 2/3]))/Sqrt[3]

CROSSREFS

Sequence in context: A119387 A055941 A068076 * A050319 A132456 A080966

Adjacent sequences:  A138495 A138496 A138497 * A138499 A138500 A138501

KEYWORD

nonn,cons

AUTHOR

E. W. Weisstein (eric(AT)weisstein.com), Mar 20, 2008

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Last modified February 16 11:23 EST 2012. Contains 205907 sequences.