One quarter the number of n X n 1..4 arrays with no two neighbors of any element equal to each other.
A183353
One quarter the number of n X n 1..4 arrays with no two neighbors of any element equal to each other.
Terms
- a(0) =1a(1) =36a(2) =432a(3) =3600a(4) =24192a(5) =147456a(6) =829440a(7) =4460544a(8) =23003136a(9) =115605504a(10) =566231040a(11) =2727346176a(12) =12910067712
External references
- oeis: A183353