OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..772
FORMULA
Limit_{n -> infinity} b(n) = G, the Catalan constant (A006752).
MATHEMATICA
Numerator[Accumulate[Table[(-1)^(k + 1)/k * Sum[(-1)^i/(2*i + 1), {i, 0, k - 1}], {k, 1, 20}]]] (* Amiram Eldar, May 05 2022 *)
PROG
(PARI) a(n)=numerator( sum(k=1, n, (-1)^(k+1)/k*sum(i=0, k-1, (-1)^i/(2*i+1))))
CROSSREFS
KEYWORD
easy,frac,nonn
AUTHOR
Benoit Cloitre, Aug 28 2002
STATUS
approved