Number of 4Xn 0..3 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222909
Number of 4Xn 0..3 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =15a(1) =75a(2) =767a(3) =7794a(4) =101398a(5) =1346067a(6) =21064292a(7) =356150811a(8) =6366063573a(9) =115668702638
External references
- oeis: A222909