215644

Appears in sequences

• Number of (n+2)X(n+2) binary arrays with each 3X3 subblock nonsingular.at n=2A185525
• Number of (n+2)X5 binary arrays with each 3X3 subblock nonsingular.at n=2A185528
• T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock nonsingular.at n=12A185534
• Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|<|y-z|.at n=26A212681