Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock summing to a prime and those sums nondecreasing in every row and column.

A251460

Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock summing to a prime and those sums nondecreasing in every row and column.

Terms

    a(0) =46a(1) =168a(2) =602a(3) =1908a(4) =5926a(5) =17424a(6) =50306a(7) =141792a(8) =392326a(9) =1077744a(10) =2902034a(11) =7839120a(12) =20718262a(13) =55312368a(14) =144223010a(15) =381727440a(16) =985187686a(17) =2590354800a(18) =6631981106a(19) =17346061392a(20) =44125124758a(21) =114917794032a(22) =290786392514a(23) =754633003728

External references