Number of (n+1) X 2 binary arrays with every 2 X 2 subblock trace equal to some horizontal or vertical neighbor 2 X 2 subblock trace.

A185742

Number of (n+1) X 2 binary arrays with every 2 X 2 subblock trace equal to some horizontal or vertical neighbor 2 X 2 subblock trace.

Terms

    a(0) =0a(1) =24a(2) =40a(3) =144a(4) =344a(5) =1000a(6) =2688a(7) =7528a(8) =20648a(9) =57040a(10) =156920a(11) =432648a(12) =1192128a(13) =3286216a(14) =9056584a(15) =24960464a(16) =68789400a(17) =189584296a(18) =522495232a(19) =1440006312a(20) =3968670312a(21) =10937688528a(22) =30144344504a(23) =83078054856a(24) =228963805504

External references