Number of n X n 0..2 arrays with no element equal to any value at offset (-1,-1), (-2,0) or (0,-2) and new values introduced in order 0..2.
A274953
Number of n X n 0..2 arrays with no element equal to any value at offset (-1,-1), (-2,0) or (0,-2) and new values introduced in order 0..2.
Terms
- a(0) =1a(1) =9a(2) =90a(3) =2376a(4) =126540a(5) =14362920a(6) =3403449396
External references
- oeis: A274953