Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253833
Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =512a(1) =6339a(2) =52014a(3) =284109a(4) =156876a(5) =295098a(6) =262418a(7) =218499a(8) =347440a(9) =571191a(10) =845552a(11) =1524398a(12) =2858410a(13) =5021094a(14) =9662090a(15) =18996817a(16) =36633058a(17) =72806768a(18) =145731460a(19) =290387182a(20) =583234472a(21) =1173787454a(22) =2359763404a(23) =4752830758a(24) =9577047474
External references
- oeis: A253833