OFFSET
0,1
COMMENTS
This constant is irrational (Mingarelli, 2013).
LINKS
Angelo B. Mingarelli, Abstract factorials, Notes on Number Theory and Discrete Mathematics, Vol. 19, No. 4 (2013), pp. 43-76 (see p. 61); arXiv preprint, arXiv:0705.4299 [math.NT], 2007-2012.
EXAMPLE
0.56787931959340443852204229487773972799207537094682...
MATHEMATICA
m = Range[100]; RealDigits[Total[1/(m! * 2^Accumulate[DivisorSigma[0, m]])], 10, 100][[1]]
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Amiram Eldar, Jul 08 2021
STATUS
approved