Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222879
Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =2a(1) =11a(2) =122a(3) =1814a(4) =26311a(5) =399849a(6) =6013669a(7) =91842381a(8) =1400573929a(9) =21492587457a(10) =330100781811
External references
- oeis: A222879