Number of n X 2 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.
A232453
Number of n X 2 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.
Terms
- a(0) =3a(1) =51a(2) =381a(3) =3015a(4) =24651a(5) =198945a(6) =1607067a(7) =12991131a(8) =104990445a(9) =848511855a(10) =6857610579a(11) =55422433089a(12) =447917887827
External references
- oeis: A232453