T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

A185777

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

Terms

    a(0) =81a(1) =558a(2) =558a(3) =3844a(4) =7074a(5) =3844a(6) =26784a(7) =89118a(8) =89118a(9) =26784a(10) =186624a(11) =1151346a(12) =2046098a(13) =1151346a(14) =186624a(15) =1296000a(16) =14837270a(17) =48744342a(18) =48744342a(19) =14837270a(20) =1296000a(21) =9000000a(22) =190416934a(23) =1154712762a(24) =2171002788a(25) =1154712762a(26) =190416934

External references