T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.

A254568

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.

Terms

    a(0) =512a(1) =2384a(2) =2384a(3) =10240a(4) =10870a(5) =10240a(6) =37200a(7) =54212a(8) =54212a(9) =37200a(10) =116056a(11) =183210a(12) =312322a(13) =183210a(14) =116056a(15) =358324a(16) =536906a(17) =978154a(18) =978154a(19) =536906a(20) =358324a(21) =1029664a(22) =1612832a(23) =2647806a(24) =2148260a(25) =2647806a(26) =1612832a(27) =1029664a(28) =2800912a(29) =4205934

External references