OFFSET
1,2
LINKS
Dirk Huylebrouck, Generalizing Wallis' formula, The American Mathematical Monthly, Vol. 122, No. 4 (2015), pp. 371-372; alternative link; arXiv preprint, arXiv:1402.6577 [math.HO], 2014.
Eric Weisstein's World of Mathematics, Dirichlet Eta Function.
Wikipedia, Dirichlet eta function.
FORMULA
EXAMPLE
(2^(1/2)/1^1) * (2^(1/2)/3^(1/3)) * (4^(1/4)/3^(1/3)) * (4^(1/4)/5^(1/5)) * ...
1.37676673907488822612716594825041629908712439037992...
MATHEMATICA
RealDigits[2^(2*EulerGamma - Log[2]), 10, 120][[1]]
PROG
(PARI) 2^(2*Euler - log(2))
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Amiram Eldar, May 28 2024
STATUS
approved