Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
A252197
Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
Terms
- a(0) =1642a(1) =1313a(2) =5177a(3) =21928a(4) =92287a(5) =391996a(6) =1669356a(7) =7114929a(8) =30309104a(9) =129016093a(10) =549319099a(11) =2339547062a(12) =9963141907a(13) =42425232312a(14) =180661430088a(15) =769335984235
External references
- oeis: A252197