Number of (n+1) X 2 binary arrays with no 2 X 2 subblock sum equal to any horizontal or vertical neighbor 2 X 2 subblock sum.

A185790

Number of (n+1) X 2 binary arrays with no 2 X 2 subblock sum equal to any horizontal or vertical neighbor 2 X 2 subblock sum.

Terms

    a(0) =16a(1) =40a(2) =100a(3) =260a(4) =676a(5) =1716a(6) =4356a(7) =11220a(8) =28900a(9) =73780a(10) =188356a(11) =483476a(12) =1240996a(13) =3174900a(14) =8122500a(15) =20822100a(16) =53377636a(17) =136666036a(18) =349914436a(19) =896578580a(20) =2297284900a(21) =5883599220a(22) =15068544516a(23) =38602941396a(24) =98893896676a(25) =253305662260

External references