Number of nX2 0..2 arrays with exactly floor(nX2/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A223098
Number of nX2 0..2 arrays with exactly floor(nX2/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =0a(1) =6a(2) =16a(3) =280a(4) =1440a(5) =16352a(6) =111104a(7) =1072512a(8) =8281600a(9) =74866176a(10) =614068224a(11) =5409544192a(12) =45696688128a(13) =398896128000
External references
- oeis: A223098