OFFSET
1,3
EXAMPLE
arclength = 1.099687413739204296413721014223062752214344...
MATHEMATICA
s = Integrate[Sqrt[1 + D[Sqrt[1 + x^2], x]^2], {x, 0, 1}]
r = N[s, 200]
RealDigits[r][[1]]
CROSSREFS
KEYWORD
AUTHOR
Clark Kimberling, Jun 15 2020
STATUS
approved