Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222612
Number of nX4 0..3 arrays with no more than 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) =4a(1) =12a(2) =65a(3) =567a(4) =5746a(5) =85511a(6) =1409334a(7) =23117220a(8) =385330520a(9) =6476514601a(10) =108758391488
External references
- oeis: A222612