OFFSET
0,4
COMMENTS
Note that Morales et al. (2016) appear to assert that Euler(n)*Fibonacci(n) >= n!, but that is using a non-standard indexing for the Fibonacci numbers - see A293151 for their version.
LINKS
Alejandro H. Morales, I. Pak, G. Panova, Why is pi < 2 phi?, Preprint, 2016. [Note that this paper uses a non-standard indexing for the Fibonacci numbers - compare A293151.]
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Oct 09 2017
STATUS
approved