Number of nX2 0..2 arrays with no more than floor(nX2/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
A222849
Number of nX2 0..2 arrays with no more than floor(nX2/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =1a(1) =7a(2) =51a(3) =391a(4) =2894a(5) =22491a(6) =173099a(7) =1351439a(8) =10562301a(9) =83067164a(10) =654664840a(11) =5177288283a(12) =41027782738a(13) =325853413087
External references
- oeis: A222849