Number of nX2 0..2 arrays with no more than floor(nX2/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A223144
Number of nX2 0..2 arrays with no more than floor(nX2/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =1a(1) =7a(2) =31a(3) =187a(4) =990a(5) =5721a(6) =32155a(7) =185667a(8) =1068413a(9) =6209614a(10) =36152732a(11) =211488161a(12) =1240108650a(13) =7292753853a(14) =42976317875a(15) =253780411459
External references
- oeis: A223144