375826

Appears in sequences

• Number of (3+1)X(n+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..3+1} nondecreasing.at n=8A233368
• a(n) = Sum_k k*A333274(n,k).at n=27A333276