Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253994
Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =2736a(1) =13188a(2) =68176a(3) =350496a(4) =1738927a(5) =8730836a(6) =43840181a(7) =217514688a(8) =1076487005a(9) =5316416857a(10) =26147742882a(11) =128223160536a(12) =627281505519
External references
- oeis: A253994