T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A257189
T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =512a(1) =2642a(2) =2642a(3) =10285a(4) =10925a(5) =10285a(6) =39891a(7) =47283a(8) =44795a(9) =39891a(10) =160753a(11) =220126a(12) =252288a(13) =213631a(14) =160753a(15) =639228a(16) =1006996a(17) =1488364a(18) =1661786a(19) =991554a(20) =639228a(21) =2462249a(22) =4613955a(23) =9058784a(24) =12941212a(25) =10392884a(26) =4507765a(27) =2462249a(28) =9299264
External references
- oeis: A257189