Number of 4Xn 0..2 arrays with exactly floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222693
Number of 4Xn 0..2 arrays with exactly floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =0a(1) =50a(2) =420a(3) =3189a(4) =29770a(5) =288829a(6) =3056797a(7) =33647294a(8) =383305129a(9) =4415390639a(10) =51510198510a(11) =603131077948
External references
- oeis: A222693