281122

Appears in sequences

• Sum of the n smallest numbers having the sum of their digits equal to n.at n=31A081928
• Number of (2+1) X (n+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i*x(i,j), i=1..2+1} nondecreasing.at n=12A233063