T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
A235736
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
Terms
- a(0) =16a(1) =58a(2) =58a(3) =209a(4) =380a(5) =209a(6) =746a(7) =2481a(8) =2481a(9) =746a(10) =2660a(11) =15963a(12) =29130a(13) =15963a(14) =2660a(15) =9476a(16) =102683a(17) =337412a(18) =337412a(19) =102683a(20) =9476a(21) =33753a(22) =659235a(23) =3906424a(24) =7041734a(25) =3906424a(26) =659235a(27) =33753a(28) =120216a(29) =4232565
External references
- oeis: A235736