Assertion: sequence's number | /r/HasProperty | either 4i
Facets:
value: at the tree level
type: LOCATION
Source sentences:
text: The number of nodes at the tree level i is equal to the actual vocabulary size of words with the length i in a given sequence; the number of nodes in the most balanced tree, which corresponds to the most complex sequence of length N, at the tree level i is either 4i or N-i+1, whichever is smaller.