Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
A252612
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =6403a(1) =13879a(2) =58239a(3) =147592a(4) =814008a(5) =4274586a(6) =11003134a(7) =62184813a(8) =344281115a(9) =865035915a(10) =4979018733a(11) =28760743204a(12) =70988021803a(13) =414853576330
External references
- oeis: A252612