1/12 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock containing three of each value.
A184377
1/12 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock containing three of each value.
Terms
- a(0) =140a(1) =1494a(2) =8936a(3) =38642a(4) =207470a(5) =890982a(6) =3651098
External references
- oeis: A184377