Number of n X 2 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, diagonally or antidiagonally.
A232145
Number of n X 2 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, diagonally or antidiagonally.
Terms
- a(0) =3a(1) =23a(2) =145a(3) =887a(4) =5487a(5) =33957a(6) =210039a(7) =1299219a(8) =8036625a(9) =49712291a(10) =307505983a(11) =1902144221a(12) =11766121259a(13) =72781867263a(14) =450207854133
External references
- oeis: A232145