31791

Appears in sequences

• Expansion of layer susceptibility series for square lattice.at n=11A007288
• Number of n X n binary arrays with all ones connected only in a 1101-0111 pattern in any orientation.at n=6A146722
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-0111 pattern in any orientation.at n=14A146724
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-0111 pattern in any orientation.at n=15A146724
• Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,4,1,0 for x=0,1,2,3,4.at n=5A196986
• Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,3,4,1,0 for x=0,1,2,3,4.at n=4A196987
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,3,4,1,0 for x=0,1,2,3,4.at n=49A196989
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,3,4,1,0 for x=0,1,2,3,4.at n=50A196989
• Number of fixed polyominoes minus number of free polyominoes for order n.at n=10A283108
• Number of surviving (but not bifurcating) odd nodes at generation n in the binary tree of persistently squarefree numbers (see A293230).at n=40A293519
• a(1) = 1; a(n) = Sum_{d|n, d < n} p(n/d) * a(d), where p = A000041 (partition numbers).at n=38A328424