T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
A235833
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
Terms
- a(0) =81a(1) =549a(2) =549a(3) =3459a(4) =8160a(5) =3459a(6) =20537a(7) =112146a(8) =110923a(9) =20537a(10) =118383a(11) =1403872a(12) =3294824a(13) =1378463a(14) =118383a(15) =668041a(16) =16791083a(17) =87473420a(18) =87276535a(19) =16385455a(20) =668041a(21) =3720671a(22) =193298612a(23) =2193348247a(24) =4948377018a(25) =2183863895a(26) =187651928
External references
- oeis: A235833