Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
A253370
Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally ne-to-sw.
Terms
- a(0) =2500a(1) =22877a(2) =219438a(3) =1027387a(4) =5829147a(5) =21245477a(6) =92753092a(7) =299160892a(8) =1126530715a(9) =3407488838a(10) =11740231069a(11) =34352248435a(12) =112041051335a(13) =322932426766
External references
- oeis: A253370