T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing rowwise and columnwise.

A235548

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing rowwise and columnwise.

Terms

    a(0) =16a(1) =48a(2) =48a(3) =141a(4) =222a(5) =141a(6) =378a(7) =1049a(8) =1049a(9) =378a(10) =988a(11) =4348a(12) =8711a(13) =4348a(14) =988a(15) =2482a(16) =17658a(17) =61401a(18) =61401a(19) =17658a(20) =2482a(21) =6109a(22) =67012a(23) =429443a(24) =758256a(25) =429443a(26) =67012a(27) =6109a(28) =14712a(29) =247639

External references