A large number defined as
where the circle notation denotes " in squares," and triangles and squares are expanded in terms of Steinhaus-Moser notation (Steinhaus 1999, pp. 28-29). Here, the typographical error of Steinhaus has been corrected.
More things to try:
Weisstein, Eric W. "Mega." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Mega.html
denotes "
in 
squares," and triangles and squares
are expanded in terms of Steinhaus-Moser
notation (Steinhaus 1999, pp. 28-29). Here, the typographical error of Steinhaus
has been corrected.
