178416

Appears in sequences

• Number of 3 X n 0..2 arrays with rows nondecreasing and antidiagonals unimodal.at n=9A224013
• Triangular array read by rows. T(n,k) is the number of 2-colored labeled graphs on n nodes with exactly k edges; n >= 0, 0 <= k <= A002620(n).at n=54A228890
• Irregular triangular array read by rows: T(n,k) is the number of 2-colored simple labeled graphs on n nodes that have exactly k edges, 0<=k<=A002620(n), n>=1.at n=53A241669