60362

Appears in sequences

• Number of staircase polygons of perimeter 2n with 2 (staircase polygon) holes on square lattice (not allowing rotations).at n=4A057411
• Number of (n+2)X(n+2) binary arrays avoiding patterns 001 and 100 in rows and columns.at n=2A202309
• Number of (n+2)X5 binary arrays avoiding patterns 001 and 100 in rows and columns.at n=2A202312
• T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 100 in rows and columns.at n=12A202317
• Number of (n+1) X (2+1) 0..2 arrays with the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=8A237631
• a(n) is the smallest number which can be represented as the sum of four distinct nonzero n-gonal numbers in exactly n ways, or -1 if no such number exists.at n=25A374274