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 columnwise and nonincreasing rowwise.
A235818
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 columnwise and nonincreasing rowwise.
Terms
- a(0) =256a(1) =2894a(2) =2894a(3) =28978a(4) =87888a(5) =28978a(6) =268448a(7) =2287822a(8) =2273170a(9) =268448a(10) =2377726a(11) =52447112a(12) =153490516a(13) =52510194a(14) =2377726a(15) =20374112a(16) =1113883030a(17) =8998042696a(18) =9225012664a(19) =1128547722a(20) =20374112a(21) =170668898a(22) =22196597522a(23) =482216047328
External references
- oeis: A235818