545626043

Appears in sequences

• Number of nX3 arrays containing 3 indistinguishable copies of 1..n with lexicographical ordering of rows strictly increasing and columns strictly decreasing.at n=6A180841
• T(n,k)=number of nXk arrays containing k indistinguishable copies of 1..n with lexicographical ordering of rows strictly increasing and columns strictly decreasing.at n=42A180843