1/6 the number of (n+2)X9 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.
A184475
1/6 the number of (n+2)X9 0..2 arrays with each 3X3 subblock containing one of one value, four of another, and four of the last.
Terms
- a(0) =559305a(1) =645837a(2) =747735a(3) =878625a(4) =1219455a(5) =1782585a(6) =2909367
External references
- oeis: A184475