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 A103714 Decimal expansion of the area of the surface generated by revolving one arch of the cosine curve about the x-axis. 1
 1, 4, 4, 2, 3, 5, 9, 9, 4, 4, 8, 4, 1, 4, 0, 9, 3, 9, 2, 9, 3, 7, 5, 4, 6, 5, 5, 3, 9, 6, 0, 1, 3, 3, 5, 3, 5, 8, 0, 5, 4, 1, 1, 5, 2, 3, 5, 9, 5, 2, 1, 0, 0, 1, 2, 9, 2, 1, 7, 6, 5, 3, 4, 9, 2, 2, 6, 2, 6, 0, 7, 2, 9, 7, 2, 2, 1, 9, 5, 3, 9, 3, 0, 2, 9, 2, 4, 3, 8, 4, 2, 1, 9, 5, 5, 3, 9, 6, 5, 8, 6, 5, 9, 8, 6 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 COMMENTS Equal to Pi times twice its analog for the parabola (see A103710). REFERENCES C. E. Love, Differential and Integral Calculus, 4th ed., Macmillan, 1950, p. 288. S. Reese, A universal parabolic constant, 2004, preprint. LINKS S. R. Finch, Mathematical Constants, addenda, sec. 8.1 S. Reese and J. Sondow, MathWorld: Universal Parabolic Constant Wikipedia, Universal parabolic constant FORMULA 2*Pi*(sqrt(2) + log(1 + sqrt(2))). EXAMPLE 14.423599448414093929375465539601335358054115235952... CROSSREFS Cf. 2*A000796*A103710. See also A103713. Sequence in context: A031351 A068923 A222295 * A260486 A193514 A112108 Adjacent sequences:  A103711 A103712 A103713 * A103715 A103716 A103717 KEYWORD cons,easy,nonn AUTHOR Sylvester Reese and Jonathan Sondow, Feb 21 2005 STATUS approved

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Last modified July 28 19:33 EDT 2021. Contains 346335 sequences. (Running on oeis4.)