Number of 2Xn 0..3 arrays with exactly floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222749
Number of 2Xn 0..3 arrays with exactly 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) =0a(1) =6a(2) =32a(3) =657a(4) =7546a(5) =124363a(6) =1710608a(7) =26389570a(8) =386047246a(9) =5871176993a(10) =88003925336
External references
- oeis: A222749