Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the medians of the central row and column nondecreasing horizontally and vertically.
A254991
Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the medians of the central row and column nondecreasing horizontally and vertically.
Terms
- a(0) =512a(1) =2679a(2) =10762a(3) =44548a(4) =193488a(5) =827673a(6) =3456356a(7) =14347670a(8) =59706588a(9) =248566303a(10) =1033130316a(11) =4290307069a(12) =17817336950a(13) =74000251757a(14) =307313144732
External references
- oeis: A254991