Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.

A253369

Number of (n+1)X(2+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.

Terms

    a(0) =450a(1) =3111a(2) =22631a(3) =103572a(4) =521009a(5) =1977416a(6) =8184420a(7) =28090376a(8) =103642465a(9) =335513910a(10) =1152080497a(11) =3601128859a(12) =11804897109a(13) =36133666589a(14) =114900581827a(15) =347429189096

External references