Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253428
Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =16a(1) =58a(2) =85a(3) =156a(4) =300a(5) =588a(6) =1164a(7) =2316a(8) =4620a(9) =9228a(10) =18444a(11) =36876a(12) =73740a(13) =147468a(14) =294924a(15) =589836a(16) =1179660a(17) =2359308a(18) =4718604a(19) =9437196a(20) =18874380a(21) =37748748a(22) =75497484a(23) =150994956a(24) =301989900a(25) =603979788
External references
- oeis: A253428