Number of nX3 0..2 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222668
Number of nX3 0..2 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =0a(1) =2a(2) =2a(3) =40a(4) =90a(5) =1336a(6) =3458a(7) =44516a(8) =126476a(9) =1527344a(10) =4599422a(11) =53131172a(12) =167316392a(13) =1872027432a(14) =6086187592a(15) =66611566008a(16) =221500197840
External references
- oeis: A222668