20119

Appears in sequences

• Table read by antidiagonals: T(n,k) = number of labeled partitions of (n,k) into pairs (i,j).at n=48A108470
• Table read by antidiagonals: T(n,k) = number of labeled partitions of (n,k) into pairs (i,j).at n=51A108470
• T(n,k)=Number of nXk 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=46A297314
• Number of 2 X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=8A297315
• Setwise difference A340150 \ A340076.at n=42A340151
• Irregular triangle read by rows: T(n,k) is the number of endofunctions on [n] whose fourth-largest component has size exactly k; n >= 0, 0 <= k <= floor(n/4).at n=11A350275