26674

Appears in sequences

• Number of nonnegative integer 3 X 3 matrices with no zero rows or columns and with sum of elements equal to n, up to row and column permutation.at n=14A054975
• Sum of the areas of the Durfee squares of all partitions of n.at n=26A116503
• The number of single edges on the boundary of ordered trees with n edges.at n=10A228180
• a(n) = Sum_k k*A333275(n,k).at n=13A333277