Number of (2+1) X (n+1) 0..2 arrays with every 2 X 2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
A253376
Number of (2+1) X (n+1) 0..2 arrays with every 2 X 2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
Terms
- a(0) =450a(1) =3111a(2) =22877a(3) =148389a(4) =945748a(5) =5125790a(6) =27587386a(7) =130018165a(8) =611215024a(9) =2593349603a(10) =10992085241a(11) =43067682706a(12) =168673810979a(13) =621760259909
External references
- oeis: A253376