OFFSET
1,3
LINKS
FORMULA
EXAMPLE
a(4) = 5. There are two partitions of 4 into two squarefree parts: (3, 1) and (2, 2). The sum of the larger parts of these partitions is 3 + 2 = 5.
a(5) = 3. There is only one partition of 5 into two squarefree parts: (3, 2). The larger part is 3, thus a(5) = 3.
MAPLE
MATHEMATICA
Table[Sum[(n - i) MoebiusMu[i]^2 * MoebiusMu[n - i]^2, {i, Floor[n/2]}], {n, 70}]
Table[Total[Select[IntegerPartitions[n, {2}], AllTrue[#, SquareFreeQ]&][[All, 1]]], {n, 60}] (* Harvey P. Dale, Apr 26 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wesley Ivan Hurt, Oct 02 2015
STATUS
approved