Number of n X 2 arrays containing 2 copies of 0..n-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
A265677
Number of n X 2 arrays containing 2 copies of 0..n-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =23a(4) =209a(5) =2301a(6) =29992a(7) =450525a(8) =7666097a(9) =145748085a(10) =3062086652a(11) =70451319403
External references
- oeis: A265677