T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise.
A235573
T(n,k)=Number of (n+1)X(k+1) 0..1 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) =16a(1) =50a(2) =50a(3) =144a(4) =250a(5) =144a(6) =398a(7) =1120a(8) =1120a(9) =398a(10) =1076a(11) =4670a(12) =8046a(13) =4670a(14) =1076a(15) =2866a(16) =18606a(17) =53728a(18) =53728a(19) =18606a(20) =2866a(21) =7560a(22) =71710a(23) =336836a(24) =599834a(25) =336836a(26) =71710a(27) =7560a(28) =19798a(29) =270016
External references
- oeis: A235573