Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 4.
A183623
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 4.
Terms
- a(0) =19a(1) =87a(2) =355a(3) =1383a(4) =5299a(5) =20247a(6) =77635a(7) =299463a(8) =1162579a(9) =4540407
External references
- oeis: A183623