131224

Appears in sequences

• Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=14A233297
• a(n) = n*(n-1)/2 + 2^(n-1) - 1.at n=17A335439