555060

Appears in sequences

• a(n) = n^2*(n+1)*(3*n+1)/4.at n=29A213827
• Number of nX6 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.at n=8A266933
• Ways to tile a 5 X (2n+1) floor with tatami mats, including one monomer.at n=36A281791