Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A223127
Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =2a(1) =10a(2) =64a(3) =489a(4) =3599a(5) =27803a(6) =212771a(7) =1656545a(8) =12904694a(9) =101255205a(10) =796288843a(11) =6286246396a(12) =49736262634a(13) =394474774687
External references
- oeis: A223127