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A370374
Decimal expansion of 2*log(2) - 4*Catalan/Pi.
0
2, 2, 0, 0, 5, 0, 7, 4, 4, 9, 9, 6, 6, 1, 5, 4, 9, 8, 2, 8, 0, 9, 2, 6, 4, 1, 7, 0, 4, 2, 7, 7, 3, 4, 6, 0, 6, 9, 4, 7, 3, 5, 6, 5, 2, 7, 7, 7, 1, 6, 1, 4, 2, 7, 1, 9, 7, 3, 5, 3, 7, 4, 2, 5, 3, 9, 7, 9, 6, 6, 9, 6, 4, 1, 7, 6, 3, 3, 9, 8, 4, 3, 0, 5, 2, 1, 9, 3
OFFSET
0,1
LINKS
Sheldon Yang, Some properties of Catalan's constant G, Internat. J. Math. Ed. Sci. Tech. 23 (4) (1992) 549-556, L*(0).
FORMULA
Equals Sum_{n>=1} ((2n-1)!!/(2n)!!)^2 / (2*n).
Equals A016627 - A218387.
EXAMPLE
0.22005074499...
MAPLE
2*log(2)-4*Catalan/Pi ; evalf(%) ;
MATHEMATICA
RealDigits[2*Log[2] - 4*Catalan/Pi, 10, 120][[1]] (* Amiram Eldar, Jun 10 2024 *)
PROG
(PARI) 2*log(2) - 4*Catalan/Pi \\ Amiram Eldar, Jun 10 2024
CROSSREFS
Sequence in context: A344901 A330619 A245693 * A297866 A298133 A298070
KEYWORD
nonn,cons
AUTHOR
R. J. Mathar, Jun 07 2024
STATUS
approved