1989792

Appears in sequences

• Expansion of e.g.f.: (1-x)^(-2x).at n=9A053489
• Number of (n+1) X (2+1) 0..3 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=4A237953
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=16A237956
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=19A237956
• Number of set partitions of [n] having exactly two pairs (m,m+1) such that m is in some block b and m+1 is in block b+1.at n=11A271789