Number of (n+1)X2 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.
A203789
Number of (n+1)X2 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.
Terms
- a(0) =112a(1) =784a(2) =5488a(3) =38416a(4) =268912a(5) =1882384a(6) =13176688a(7) =92236816a(8) =645657712a(9) =4519603984a(10) =31637227888a(11) =221460595216
External references
- oeis: A203789