Number of 6 X n 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

A223842

Number of 6 X n 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =7a(1) =49a(2) =232a(3) =824a(4) =2388a(5) =5992a(6) =13582a(7) =28642a(8) =57306a(9) =110164a(10) =205131a(11) =371923a(12) =658926a(13) =1143584a(14) =1947904a(15) =3261320a(16) =5374024a(17) =8725020a(18) =13970658a(19) =22081342a(20) =34476575a(21) =53211615a(22) =81232894a(23) =122724138a(24) =183570978a(25) =271978936a(26) =399288201a(27) =581038793a(28) =838351784a(29) =1199706462

External references