Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.
A252186
Number of (n+2) X (2+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 1 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 1 3 6 or 7.
Terms
- a(0) =1440a(1) =1886a(2) =2610a(3) =3996a(4) =6368a(5) =9508a(6) =15094a(7) =24092a(8) =36352a(9) =58610a(10) =94310a(11) =142892a(12) =231354a(13) =373418a(14) =566836a(15) =919562a(16) =1486322a(17) =2258180a(18) =3666858a(19) =5930882a(20) =9014692a(21) =14644970a(22) =23695010a(23) =36023012a(24) =58535274a(25) =94723298a(26) =144020836a(27) =234052202
External references
- oeis: A252186