Aggregate all children of a taxonomy term

My configuration (overview)

Vocabulary:

Parent 1
-- Child 1
-- Child 2
Parent 2
-- Child 3
-- Child 4

Nodes don't have parent terms.

View

Relationship: Taxonomy parent
Fields: Taxonomy term (parent from relationship), Nid, Aggregate
Filters: Node type, Vocabulary (parent from relationship)
Aggregate:
Group on: Taxonomy term (parent from relationship)
Aggregate: Nid
Sort: Taxonomy term (parent from relationship)
Result:

Term: Parent 1
Nid count: 14
Term: Parent 1
Nid count: 20
Term: Parent 2
Nid count: 18
Term: Parent 2
Nid count: 31

So, there is a separate entry for each child.

Is it possible to achieve something like:

Term: Parent 1
Nid count: 34
Term: Parent 2
Nid count: 49