Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222662
Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =3a(1) =9a(2) =44a(3) =452a(4) =4241a(5) =62406a(6) =1058776a(7) =17374571a(8) =288771291a(9) =4860565711a(10) =81668904553
External references
- oeis: A222662