1973400

Appears in sequences

• Eighth column of quadrinomial coefficients.at n=21A001919
• Number of labeled pure 2-complexes on n nodes (0-simplexes) with 5 2-simplexes and 8 1-simplexes.at n=21A054559
• Triangle read by rows: T(n,k) is the number of nonroot nodes of outdegree k (0<=k<=n-1) in all non-crossing trees with n edges.at n=47A100400
• Number of -n..n arrays x(0..6) of 7 elements with zero sum and no element more than one greater than the previous.at n=20A199851
• a(n) = 3*binomial(n+1,7).at n=19A253944