Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.
A252571
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.
Terms
- a(0) =2985a(1) =8980a(2) =30532a(3) =107651a(4) =498696a(5) =1887578a(6) =7115253a(7) =31894631a(8) =122743127a(9) =470091119a(10) =2102294795a(11) =8141112826a(12) =31313195196a(13) =140219334014a(14) =544334882366
External references
- oeis: A252571