1/4 the number of (n+1)X3 0..3 arrays with every 2X2 subblock having distinct edge sums.
A209730
1/4 the number of (n+1)X3 0..3 arrays with every 2X2 subblock having distinct edge sums.
Terms
- a(0) =124a(1) =1096a(2) =9712a(3) =86744a(4) =775096a(5) =6933120a(6) =62007896a(7) =554698328a(8) =4961776976a(9) =44385441816a(10) =397039390488
External references
- oeis: A209730