Number of (n+2)X3 0..5 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

A186172

Number of (n+2)X3 0..5 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Terms

    a(0) =520017a(1) =10084236a(2) =143369699a(3) =1662436696a(4) =16382439469a(5) =140871930232

External references