Number of (n+2)X3 0..2 arrays with each 3X3 subblock having sum 9.
A187640
Number of (n+2)X3 0..2 arrays with each 3X3 subblock having sum 9.
Terms
- a(0) =3139a(1) =17701a(2) =101419a(3) =596653a(4) =3703651a(5) =23126677a(6) =145502251a(7) =935121589a(8) =6025592131a(9) =38949920557a(10) =254629101139
External references
- oeis: A187640