Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.
A252565
Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.
Terms
- a(0) =6855a(1) =37430a(2) =270672a(3) =748814a(4) =6914968a(5) =52263770a(6) =145399017a(7) =1341388351a(8) =10184411086a(9) =28321894951a(10) =260779474542
External references
- oeis: A252565