T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01.

Terms

a(0) =50a(1) =222a(2) =336a(3) =867a(4) =2740a(5) =2167a(6) =3123a(7) =17129a(8) =31895a(9) =14180a(10) =10660a(11) =89429a(12) =320950a(13) =379440a(14) =92429a(15) =35064a(16) =410718a(17) =2482824a(18) =6182747a(19) =4499219a(20) =603249a(21) =112373a(22) =1716324a(23) =15857764a(24) =71431719a(25) =119032248a(26) =53420941a(27) =3935721a(28) =353517a(29) =6678657