OFFSET
0,3
EXAMPLE
a(8) = 11 because we have [7, 1], [6, 2], [6, 1, 1], [5, 3], [5, 2, 1], [3, 3, 2], [3, 2, 1, 1, 1], [3, 1, 1, 1, 1, 1], [2, 2, 2, 1, 1], [2, 2, 1, 1, 1, 1] and [2, 1, 1, 1, 1, 1, 1].
MATHEMATICA
Join[{1}, Table[Length[Select[IntegerPartitions[n], SquareFreeQ[Length[#]] && AllTrue[#, SquareFreeQ] &]], {n, 55}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, May 07 2017
STATUS
approved