Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A255757

Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =2485a(1) =7765a(2) =24536a(3) =72884a(4) =180619a(5) =386060a(6) =778827a(7) =1580226a(8) =3130455a(9) =5810558a(10) =10404621a(11) =19209556a(12) =35754204a(13) =64042438a(14) =112969799a(15) =211210444a(16) =404550623a(17) =741978523a(18) =1340845547a(19) =2623013518a(20) =5281311943a(21) =10042459246a(22) =18653169405

External references