OFFSET
0,1
COMMENTS
The formula section of A000010 provides the following conjecture: Sum_{i>=2} (-1)^i/(i*phi(i)) exists and is approximately 0.558. - Orges Leka (oleka(AT)students.uni-mainz.de), Dec 23 2004
A more accurate value of the conjectured limit is provided.
FORMULA
Equals 1 - (1/5) * A065484. - Amiram Eldar, Nov 11 2020
EXAMPLE
0.5592286807124280424254343367039820674865653612424...
PROG
(PARI) 1 - prodeulerrat(1 + p/((p-1)^2*(p+1)))/5 \\ Amiram Eldar, Nov 11 2020
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Hugo Pfoertner, May 31 2020
EXTENSIONS
More terms from Amiram Eldar, Nov 11 2020
STATUS
approved