OFFSET
1,2
COMMENTS
a(11) > 8*10^10, if it exists.
The corresponding ratios A353900(k)/k are 1, 2, 2, 1, 2, 1, 4, 2, 2, 1, ...
EXAMPLE
MATHEMATICA
f[p_, e_] := 1 + Sum[p^(2^k), {k, 0, Floor[Log2[e]]}]; s[1] = 1; s[n_] := Times @@ f @@@ FactorInteger[n]; Select[Range[6.5*10^6], Divisible[s[#], #] &]
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, May 10 2022
STATUS
approved