Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
A251921
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7.
Terms
- a(0) =8932a(1) =19964a(2) =59760a(3) =253148a(4) =1316762a(5) =6752446a(6) =36065236a(7) =196441982a(8) =1066828482a(9) =5808060274a(10) =31696059176a(11) =172926905548a(12) =943553450318
External references
- oeis: A251921