OFFSET
1,8
COMMENTS
FORMULA
a(2^n) = A126796(n).
EXAMPLE
The a(64) = 5 factorizations:
(2*2*2*2*2*2)
(2*2*2*2*4)
(2*2*2*8)
(2*2*4*4)
(2*4*8)
The a(96) = 4 factorizations:
(2*2*2*2*2*3)
(2*2*2*3*4)
(2*2*3*8)
(2*3*4*4)
MATHEMATICA
facs[n_]:=If[n<=1, {{}}, Join@@Table[Map[Prepend[#, d]&, Select[facs[n/d], Min@@#>=d&]], {d, Rest[Divisors[n]]}]];
Table[Length[Select[facs[n], Union[Times@@@Subsets[#]]==Divisors[n]&]], {n, 100}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, May 30 2019
STATUS
approved