T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.
A235577
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.
Terms
- a(0) =256a(1) =2894a(2) =2894a(3) =28978a(4) =102188a(5) =28978a(6) =268448a(7) =3103656a(8) =3103656a(9) =268448a(10) =2377726a(11) =82875972a(12) =317142694a(13) =82875972a(14) =2377726a(15) =20374112a(16) =2014103692a(17) =28760293894a(18) =28760293894a(19) =2014103692a(20) =20374112a(21) =170668898a(22) =45287503606
External references
- oeis: A235577