Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.
A252547
Number of (3+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.
Terms
- a(0) =2142a(1) =15480a(2) =88146a(3) =331884a(4) =2576592a(5) =15204660a(6) =65274264a(7) =519308064a(8) =3103786152a(9) =14646511152a(10) =117255965760a(11) =703300899408
External references
- oeis: A252547