2,2

Equal to Pi times twice its analog for the parabola (see A103710).

C. E. Love, Differential and Integral Calculus, 4th ed., Macmillan, 1950, p. 288.

S. Reese, A universal parabolic constant, 2004, preprint.

Table of n, a(n) for n=2..106.

S. R. Finch, Mathematical Constants, addenda, sec. 8.1

S. Reese, Pohle Colloquium Video Lecture: The universal parabolic constant, February 2, 2005

S. Reese and J. Sondow, MathWorld: Universal Parabolic Constant

Wikipedia, Universal parabolic constant

2*Pi*(sqrt(2) + log(1 + sqrt(2))).

14.423599448414093929375465539601335358054115235952...

Cf. 2*A000796*A103710. See also A103713.

Sequence in context: A031351 A068923 A222295 * A260486 A193514 A112108

Adjacent sequences: A103711 A103712 A103713 * A103715 A103716 A103717

cons,easy,nonn

Sylvester Reese and Jonathan Sondow, Feb 21 2005

approved