OFFSET
0,2
COMMENTS
g(x) <= n can be replaced by g(x) = n.
LINKS
Giovanni Resta, Table of n, a(n) for n = 0..250 (based on A002182 b-file)
EXAMPLE
In the range of g(x) <= 5, the values of d(x) can be: 1, 2, 3, 4, 5, 6, 8 of which 8 is the maximal, so a(n) = a(g(x)) = 8.
MATHEMATICA
Max /@ Table[DivisorSigma[0, Floor[2^(n - 1) + k]], {n, 0, 22}, {k, Ceiling[2^(n - 1)]}] (* Michael De Vlieger, May 10 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(22)-a(32) from Alex Ratushnyak, Jun 06 2013
a(33)-a(49) from Giovanni Resta, Jun 06 2013
STATUS
approved