Number of (n+2)X(n+2) 0..4 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

A186087

Number of (n+2)X(n+2) 0..4 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Terms

    a(0) =102251a(1) =22559052a(2) =4527262140a(3) =837192826927

External references