OFFSET
1,2
COMMENTS
LINKS
Robert Israel, Table of n, a(n) for n = 1..2000
EXAMPLE
For n = 4; number 7 is the smallest number k with floor(sigma(k)/tau(k)) = 4; floor(sigma(7)/tau(7)) = floor(8/2) = 4.
MAPLE
N:= 100: # for a(1)..a(N)
V:= Vector(N):
for k from 1 to N^2 do
v:= floor(numtheory:-sigma(k)/numtheory:-tau(k));
if v <= N and V[v]=0 then V[v]:= k fi
od:
convert(V, list); # Robert Israel, Sep 13 2020
PROG
(Magma) Ax:=func<n|exists(r){m:m in[1..10000] | Floor(SumOfDivisors(m)/ NumberOfDivisors(m)) eq n}select r else 0>; [Ax(n): n in[1..80]]
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Jaroslav Krizek, Mar 23 2019
STATUS
approved