Number of (n+2)X4 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

A186833

Number of (n+2)X4 binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

Terms

    a(0) =2688a(1) =19904a(2) =147428a(3) =1075071a(4) =6019798a(5) =33731024a(6) =188814612a(7) =897952936a(8) =4272342678a(9) =20338694068a(10) =87016169948a(11) =372379475914

External references