Number of (n+2)X7 0..2 arrays with each 3X3 subblock having sum 9.
A187644
Number of (n+2)X7 0..2 arrays with each 3X3 subblock having sum 9.
Terms
- a(0) =3703651a(1) =9368309a(2) =24351579a(3) =67476109a(4) =234213387
External references
- oeis: A187644