Number of (2+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.

A231999

Number of (2+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one.

Terms

    a(0) =9a(1) =32a(2) =121a(3) =406a(4) =1225a(5) =3916a(6) =12769a(7) =41180a(8) =131769a(9) =423168a(10) =1361889a(11) =4378942a(12) =14070001a(13) =45221064a(14) =145371249a(15) =467284392a(16) =1501950025a(17) =4827700176a(18) =15517934041a(19) =49879756014a(20) =160328968921a(21) =515348072772

External references