180104

Appears in sequences

• Number of (n+1)X(1+1) 0..2 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing.at n=7A233114
• Coefficients of mock modular form H_2^(4) (divided by 2).at n=20A256052