Number of nX5 0..2 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222670
Number of nX5 0..2 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =4a(1) =24a(2) =90a(3) =2370a(4) =17696a(5) =426362a(6) =4030527a(7) =115311310a(8) =1138939624a(9) =33371066606a(10) =333504416113
External references
- oeis: A222670