Number of (n+1)X(2+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.

A250426

Number of (n+1)X(2+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.

Terms

    a(0) =36a(1) =108a(2) =324a(3) =720a(4) =1600a(5) =3000a(6) =5625a(7) =9450a(8) =15876a(9) =24696a(10) =38416a(11) =56448a(12) =82944a(13) =116640a(14) =164025a(15) =222750a(16) =302500a(17) =399300a(18) =527076a(19) =679536a(20) =876096a(21) =1107288a(22) =1399489a(23) =1739010a(24) =2160900a(25) =2646000a(26) =3240000a(27) =3916800a(28) =4734976a(29) =5659776

External references