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A118307
Decimal expansion of the arc length of the bifolium.
0
7, 1, 5, 5, 5, 4, 7, 2, 4, 1, 5, 2, 9, 4, 3, 9, 3, 9, 7, 2, 6, 8, 4, 1, 0, 9, 2, 0, 7, 5, 4, 2, 4, 9, 4, 0, 8, 8, 0, 6, 1, 3, 1, 0, 5, 3, 9, 1, 2, 3, 5, 9, 3, 2, 9, 2, 2, 3, 8, 8, 4, 8, 4, 8, 9, 3, 0, 5, 9, 6, 9, 2, 2, 5, 6, 8, 4, 2, 8, 2, 8, 6, 4, 0, 1, 8, 3, 4, 4, 4, 4, 1, 6, 2, 3, 6, 9, 1, 2, 6, 8, 6, 4, 4, 5
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Bifolium
EXAMPLE
7.1555472415294393972...
MATHEMATICA
RealDigits[4*Sqrt[2]*NIntegrate[Sqrt[3 + 3*Cos[2q] + 2*Cos[4q]]*Sin[q], {q, 0, Pi/2}, WorkingPrecision -> 150], 10, 110][[1]]
CROSSREFS
Sequence in context: A263202 A011478 A334072 * A351738 A178757 A376841
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Apr 22 2006
STATUS
approved