Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A254513
Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =2703a(1) =12324a(2) =55667a(3) =238740a(4) =1038340a(5) =4546393a(6) =19754506a(7) =85550331a(8) =370307568a(9) =1600037880a(10) =6905546384a(11) =29753763842a(12) =128038285985a(13) =550179273386
External references
- oeis: A254513