Number of (n+1) X (7+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
A234563
Number of (n+1) X (7+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings).
Terms
- a(0) =49506a(1) =64240a(2) =83438a(3) =128614a(4) =195558a(5) =358450a(6) =635654a(7) =1336954a(8) =2694006a(9) =6297370a(10) =14043398a(11) =35804074a(12) =86353878a(13) =236812570a(14) =605170214a(15) =1760412874a(16) =4684644726a(17) =14258344570a(18) =38987644358a(19) =122685304234a(20) =341459442198
External references
- oeis: A234563