T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically.
A254922
T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically.
Terms
- a(0) =512a(1) =2812a(2) =2812a(3) =14184a(4) =19890a(5) =14184a(6) =65548a(7) =127758a(8) =127758a(9) =65548a(10) =294960a(11) =705398a(12) =1041262a(13) =705398a(14) =294960a(15) =1302500a(16) =3788492a(17) =6104373a(18) =6104373a(19) =3788492a(20) =1302500a(21) =5646340a(22) =20154545a(23) =34618330a(24) =28576911a(25) =34618330a(26) =20154545a(27) =5646340a(28) =24197932
External references
- oeis: A254922