Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
A222886
Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =0a(1) =22a(2) =380a(3) =8986a(4) =138026a(5) =3581166a(6) =57340458a(7) =1518623878a(8) =24604366312a(9) =662054698922
External references
- oeis: A222886